Thanks this did sort out the detected issue, but now I am instantly getting another error of

The database configuration failed with the following message: Unknown state "{init-7.15.8}".

I have checked the installation and it is 7.15.8.

Below is a section of the tracelog, any help would be most appreciated

{"@t":"2022-08-26T11:12:36.5894485Z","@mt":"Starting '{MigrationName}'...","MigrationName":"Umbraco.Core","SourceContext":"Umbraco.Core.Migrations.MigrationPlan","ProcessId":107816,"ProcessName":"iisexpress","ThreadId":5,"AppDomainId":3,"AppDomainAppId":"LMW3SVC2ROOT","MachineName":"MACHINE1","Log4NetLevel":"INFO ","HttpRequestNumber":2,"HttpRequestId":"d5331524-2102-4b1b-ac69-36ed71a4c835"} {"@t":"2022-08-26T11:12:36.5898432Z","@mt":"At {OrigState}","OrigState":"{init-7.15.6}","SourceContext":"Umbraco.Core.Migrations.MigrationPlan","ProcessId":107816,"ProcessName":"iisexpress","ThreadId":5,"AppDomainId":3,"AppDomainAppId":"LMW3SVC2ROOT","MachineName":"MACHINE1","Log4NetLevel":"INFO ","HttpRequestNumber":2,"HttpRequestId":"d5331524-2102-4b1b-ac69-36ed71a4c835"} {"@t":"2022-08-26T11:12:36.6250585Z","@mt":"Database configuration failed","@l":"Error","@x":"System.Exception: Unknown state \"{init-7.15.6}\".\r\n at Umbraco.Core.Migrations.MigrationPlan.Execute(IScope scope, String fromState, IMigrationBuilder migrationBuilder, ILogger logger)\r\n at Umbraco.Core.Migrations.Upgrade.Upgrader.Execute(IScopeProvider scopeProvider, IMigrationBuilder migrationBuilder, IKeyValueService keyValueService, ILogger logger)\r\n at Umbraco.Core.Migrations.Install.DatabaseBuilder.UpgradeSchemaAndData(MigrationPlan plan)","SourceContext":"Umbraco.Core.Migrations.Install.DatabaseBuilder","ProcessId":107816,"ProcessName":"iisexpress","ThreadId":5,"AppDomainId":3,"AppDomainAppId":"LMW3SVC2ROOT","MachineName":"MACHINE1","Log4NetLevel":"ERROR","HttpRequestNumber":2,"HttpRequestId":"d5331524-2102-4b1b-ac69-36ed71a4c835"} {"@t":"2022-08-26T11:12:36.6352616Z","@mt":"The database schema validation produced the following summary: {DbSchemaSummary}","DbSchemaSummary":"The following tables were found in the database, but are not in the current schema:\r\numbracoDomains,umbracoMigration,Redirects,cmsContent,cmsContentVersion,cmsContentXml,cmsDataType,cmsDataTypePreValues,cmsDocument,cmsMedia,cmsPreviewXml,cmsPropertyData,cmsTask,cmsTaskType,MemberExportState,icUrlTracker,umbracoContent,umbracoContentVersion,umbracoMediaVersion,umbracoDocument,umbracoDataType,umbracoDomain,umbracoPropertyData,cmsContentNu,umbracoDocumentVersion,umbracoKeyValue,umbracoContentVersionCultureVariation,umbracoDocumentCultureVariation,umbracoContentSchedule\r\n \r\nThe following columns were found in the database, but are not in the current schema:\r\numbracoDomains,id,umbracoDomains,domainDefaultLanguage,umbracoDomains,domainRootStructureID,umbracoDomains,domainName,umbracoMigration,id,umbracoMigration,name,umbracoMigration,createDate,umbracoMigration,version,Redirects,Id,Redirects,IsRegex,Redirects,OldUrl,Redirects,NewUrl,Redirects,LastUpdated,Redirects,Notes,cmsContent,pk,cmsContent,nodeId,cmsContent,contentType,cmsContentVersion,id,cmsContentVersion,ContentId,cmsContentVersion,VersionId,cmsContentVersion,VersionDate,cmsContentXml,nodeId,cmsContentXml,xml,cmsDataType,pk,cmsDataType,nodeId,cmsDataType,propertyEditorAlias,cmsDataType,dbType,cmsDataTypePreValues,id,cmsDataTypePreValues,datatypeNodeId,cmsDataTypePreValues,value,cmsDataTypePreValues,sortorder,cmsDataTypePreValues,alias,cmsDocument,nodeId,cmsDocument,published,cmsDocument,documentUser,cmsDocument,versionId,cmsDocument,text,cmsDocument,releaseDate,cmsDocument,expireDate,cmsDocument,updateDate,cmsDocument,templateId,cmsDocument,newest,cmsMacro,macroScriptType,cmsMacro,macroScriptAssembly,cmsMacro,macroXSLT,cmsMacro,macroPython,cmsMedia,nodeId,cmsMedia,versionId,cmsMedia,mediaPath,cmsPreviewXml,nodeId,cmsPreviewXml,versionId,cmsPreviewXml,timestamp,cmsPreviewXml,xml,cmsPropertyData,id,cmsPropertyData,contentNodeId,cmsPropertyData,versionId,cmsPropertyData,propertytypeid,cmsPropertyData,dataInt,cmsPropertyData,dataDecimal,cmsPropertyData,dataDate,cmsPropertyData,dataNvarchar,cmsPropertyData,dataNtext,cmsTags,ParentId,cmsTask,closed,cmsTask,id,cmsTask,taskTypeId,cmsTask,nodeId,cmsTask,parentUserId,cmsTask,userId,cmsTask,DateTime,cmsTask,Comment,cmsTaskType,id,cmsTaskType,alias,MemberExportState,Id,MemberExportState,UniqueIdentifier,MemberExportState,Name,MemberExportState,ExportState,MemberExportState,Icon,cmsTemplate,design,icUrlTracker,Id,icUrlTracker,OldUrl,icUrlTracker,OldUrlQueryString,icUrlTracker,OldRegex,icUrlTracker,RedirectRootNodeId,icUrlTracker,RedirectNodeId,icUrlTracker,RedirectUrl,icUrlTracker,RedirectHttpCode,icUrlTracker,RedirectPassThroughQueryString,icUrlTracker,ForceRedirect,icUrlTracker,Notes,icUrlTracker,Is404,icUrlTracker,Referrer,icUrlTracker,Inserted,cmsContentType,isElement,cmsContentType,variations,umbracoContent,nodeId,umbracoContent,contentTypeId,umbracoContentVersion,id,umbracoContentVersion,nodeId,umbracoContentVersion,versionDate,umbracoContentVersion,userId,umbracoContentVersion,current,umbracoContentVersion,text,umbracoMediaVersion,id,umbracoMediaVersion,path,umbracoDocument,nodeId,umbracoDocument,published,umbracoDocument,edited,umbracoDataType,nodeId,umbracoDataType,propertyEditorAlias,umbracoDataType,dbType,umbracoDataType,config,umbracoLanguage,isDefaultVariantLang,umbracoLanguage,mandatory,umbracoLanguage,fallbackLanguageId,umbracoDomain,id,umbracoDomain,domainDefaultLanguage,umbracoDomain,domainRootStructureID,umbracoDomain,domainName,umbracoLog,entityType,umbracoLog,parameters,cmsMacro,macroSource,cmsMacro,macroType,cmsPropertyType,variations,umbracoPropertyData,id,umbracoPropertyData,versionId,umbracoPropertyData,propertyTypeId,umbracoPropertyData,languageId,umbracoPropertyData,segment,umbracoPropertyData,intValue,umbracoPropertyData,decimalValue,umbracoPropertyData,dateValue,umbracoPropertyData,varcharValue,umbracoPropertyData,textValue,cmsTags,languageId,umbracoRedirectUrl,culture,cmsContentNu,nodeId,cmsContentNu,published,cmsContentNu,data,cmsContentNu,rv,umbracoDocumentVersion,id,umbracoDocumentVersion,templateId,umbracoDocumentVersion,published,umbracoKeyValue,key,umbracoKeyValue,value,umbracoKeyValue,updated,umbracoContentVersionCultureVariation,id,umbracoContentVersionCultureVariation,versionId,umbracoContentVersionCultureVariation,languageId,umbracoContentVersionCultureVariation,name,umbracoContentVersionCultureVariation,date,umbracoContentVersionCultureVariation,availableUserId,umbracoDocumentCultureVariation,id,umbracoDocumentCultureVariation,nodeId,umbracoDocumentCultureVariation,languageId,umbracoDocumentCultureVariation,edited,umbracoDocumentCultureVariation,available,umbracoDocumentCultureVariation,published,umbracoDocumentCultureVariation,name,umbracoContentSchedule,id,umbracoContentSchedule,nodeId,umbracoContentSchedule,languageId,umbracoContentSchedule,date,umbracoContentSchedule,action\r\n \r\nThe following constraints (Primary Keys, Foreign Keys and Indexes) were found in the database, but are not in the current schema:\r\nFKcmsContentcmsContentTypenodeId,FKcmsContentumbracoNodeid,FKcmsContentVersioncmsContentnodeId,FKcmsContentXmlcmsContentnodeId,FKcmsDataTypeumbracoNodeid,FKcmsDataTypePreValuescmsDataTypenodeId,FKcmsDocumentcmsContentnodeId,FKcmsDocumentcmsTemplatenodeId,FKcmsDocumentumbracoNodeid,FKcmsMediacmsContentnodeId,FKcmsMediaumbracoNodeid,FKcmsMembercmsContentnodeId,FKcmsMemberumbracoNodeid,FKcmsPreviewXmlcmsContentnodeId,FKcmsPreviewXmlcmsContentVersionVersionId,FKcmsPropertyDatacmsPropertyTypeid,FKcmsPropertyDataumbracoNodeid,FKcmsPropertyTypecmsDataTypenodeId,FKcmsTagscmsTags,FKcmsTaskcmsTaskTypeid,FKcmsTaskumbracoNodeid,FKcmsTaskumbracoUser,FKcmsTaskumbracoUser1,FKumbracoDomainsumbracoNodeid,FKumbracoNodeumbracoUserid,FKumbracoContentumbracoNodeid,FKumbracoContentcmsContentTypeNodeId,FKumbracoContentVersionumbracoContentnodeId,FKumbracoContentVersionumbracoUserid,FKumbracoMediaVersionumbracoContentVersionid,FKumbracoDocumentumbracoContentnodeId,FKumbracoDataTypeumbracoNodeid,FKumbracoLanguageumbracoLanguageid,FKumbracoDomainumbracoNodeid,FKumbracoLogumbracoUserid,FKcmsMemberumbracoContentnodeId,FKcmsPropertyTypeumbracoDataTypenodeId,FKumbracoPropertyDataumbracoContentVersionid,FKumbracoPropertyDatacmsPropertyTypeid,FKumbracoPropertyDataumbracoLanguageid,FKcmsTagsumbracoLanguageid,FKcmsContentNuumbracoContentnodeId,FKumbracoDocumentVersionumbracoContentVersionid,FKumbracoDocumentVersioncmsTemplatenodeId,FKumbracoContentVersionCultureVariationumbracoContentVersionid,FKumbracoContentVersionCultureVariationumbracoLanguageid,FKumbracoContentVersionCultureVariationumbracoUserid,FKumbracoDocumentCultureVariationumbracoNodeid,FKumbracoDocumentCultureVariationumbracoLanguageid,FKumbracoContentScheduleumbracoContentnodeId,FKumbracoContentScheduleumbracoLanguageid,PKcmsContent,PKcmsContentPreviewXml,PKcmsContentVersion,PKcmsContentXml,PKcmsDataType,PKcmsDataTypePreValues,PKcmsDocument,PKcmsMedia,PKcmsPropertyData,PKcmsTask,PKcmsTaskType,PKicUrlTracker,PKMemberExportState,PKRedirects,PKstructure,PKumbracoDomains,PKumbracoMigration,PKumbracoNode,PKumbracoContent,PKumbracoContentVersion,PKumbracoMediaVersion,PKumbracoDocument,PKumbracoDataType,PKumbracoDomain,PKumbracoPropertyData,PKcmsContentNu,PKumbracoDocumentVersion,PKumbracoKeyValue,PKumbracoContentVersionCultureVariation,PKumbracoDocumentCultureVariation,PKumbracoContentSchedule\r\n \r\nThe following indexes were found in the database, but are not in the current schema:\r\nIXcmsContent,IXcmsContentVersionContentId,IXcmsContentVersionVersionId,IXcmsDataTypenodeId,IXcmsDocument,IXcmsDocumentnewest,IXcmsDocumentpublished,IXcmsMedia,IXcmsPropertyData1,IXcmsPropertyData2,IXcmsPropertyData3,nciwicmsTagRelationship9F7ECE3AEF382D3BD48B68431441EFCB,IXcmsTaskTypealias,IXicUrlTracker,IXumbracoMigration,IXumbracoNodeObjectType,IXumbracoNodeParentId,IXumbracoNodePath,IXumbracoNodeTrashed,IXumbracoNodeUniqueID,nciwiumbracoNode6D5D1301EAA27CD2478D5A8423DEEE74,IXumbracoNodeUniqueId,IXumbracoNodeParentId,IXumbracoNodePath,IXumbracoNodeTrashed,IXumbracoNodeObjectType,IXumbracoMediaVersion,IXumbracoDocumentPublished,IXumbracoLanguagefallbackLanguageId,IXumbracoPropertyDataVersionId,IXumbracoPropertyDataPropertyTypeId,IXumbracoPropertyDataLanguageId,IXumbracoPropertyDataSegment,IXcmsTagsLanguageId,IXuserLoginDtolastValidatedUtc,IXumbracoContentVersionCultureVariationVersionId,IXumbracoContentVersionCultureVariationLanguageId,IXumbracoDocumentCultureVariationNodeId,IXumbracoDocumentCultureVariationLanguageId\r\n \r\n","SourceContext":"Umbraco.Core.Migrations.Install.DatabaseBuilder","ProcessId":107816,"ProcessName":"iisexpress","ThreadId":5,"AppDomainId":3,"AppDomainAppId":"LMW3SVC2ROOT","MachineName":"MACHINE1","Log4NetLevel":"INFO ","HttpRequestNumber":2,"HttpRequestId":"d5331524-2102-4b1b-ac69-36ed71a4c835"} {"@t":"2022-08-26T11:12:36.6422572Z","@mt":"Installation step {Step} failed.","@l":"Error","@x":"System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. ---> Umbraco.Web.Install.InstallException: The database failed to upgrade. ERROR: The database configuration failed with the following message: Unknown state \"{init-7.15.6}\".\n Please check log file for additional information (can be found in '/AppData/Logs/UmbracoTraceLog.txt')\r\n at Umbraco.Web.Install.InstallSteps.DatabaseUpgradeStep.ExecuteAsync(Object model)\r\n --- End of inner exception stack trace ---\r\n at System.RuntimeMethodHandle.InvokeMethod(Object target, Object[] arguments, Signature sig, Boolean constructor)\r\n at System.Reflection.RuntimeMethodInfo.UnsafeInvokeInternal(Object obj, Object[] parameters, Object[] arguments)\r\n at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)\r\n at Umbraco.Web.Install.Controllers.InstallApiController.Data/Logs/UmbracoTraceLog.txt')\r\n at Umbraco.Web.Install.InstallSteps.DatabaseUpgradeStep.ExecuteAsync(Object model)\r\n --- End of inner exception stack trace ---\r\n at System.RuntimeMethodHandle.InvokeMethod(Object target, Object[] arguments, Signature sig, Boolean constructor)\r\n at System.Reflection.RuntimeMethodInfo.UnsafeInvokeInternal(Object obj, Object[] parameters, Object[] arguments)\r\n at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)\r\n at Umbraco.Web.Install.Controllers.InstallApiController.

Firstly, thanks so much for the quick reply. Was not expecting turn around this fast. I've actually done a v7 to v8 upgrade before, but this site has a lot of 3rd party packages (which I don't think should be an issue unless they're making database changes). But I can't log into the back office, it just runs attempts to run the upgrade then fails. I check the logs and it's the same error as what's above. So there seems to be an issue when it's trying to run the migration script from v7 to v8.

I found a work around. I just used a blank database with a vanilla umbraco 8 install. Then I installed this tool on both the umb7 install and the new umb8 install: https://our.umbraco.com/packages/backoffice-extensions/converge/

Because I have these running locally, i used ngrok to open a hole to port 80/443 so it can be accessed externally and after doing this it was able to copy all the doc types, media items, content, etc to the new umb8 database. But not sure why I was getting these errors in the first place which is why I reached out to see if anyone else had run into this.

is working on a reply...