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Hi Rabin,
Could you maybe provide a little more detail.
What version of Umbraco?
Is it a new instance or have you upgraded from a previous version?
At what point are you getting this error?
Hi Huw,
My Umbraco version is 11.1.0 and The error message occurs when is select any of the listed properties ( textarea , block grid), this problem is occur after upgrade project from v11.0.0 to v11.1.0
Have you tried deleting any temp folders etc. Could be a caching problem.
I had a 'Sequence contains more than one matching element' issue when I upgraded one of my projects recently but this was to do with the Forms module.
Perhaps the answer provided to me may help you in some way though.
https://our.umbraco.com/forum/using-umbraco-and-getting-started/110214-issue-with-umbraco-forms-after-upgrade-of-site-to-v1021
For anyone still looking for a solution, I have posted some notes on how I resolved this error in my situation in case it helps anyone.
https://our.umbraco.com/forum/using-umbraco-and-getting-started/109541-throws-an-error-while-adding-a-property-in-a-document-type#comment-344355
You can also get this error when selecting a plugin with the same alias in the package.manifest file.
I have experienced a similar problem and here is how I have fixed it. https://our.umbraco.com/packages/backoffice-extensions/doc-type-grid-editor/doc-type-grid-editor-feedback/64902-Can-we-use-doctype-compositions#comment-352571
is working on a reply...
This forum is in read-only mode while we transition to the new forum.
You can continue this topic on the new forum by tapping the "Continue discussion" link below.
Continue discussion
Sequence contains more than one matching element
Hi Rabin,
Could you maybe provide a little more detail.
What version of Umbraco?
Is it a new instance or have you upgraded from a previous version?
At what point are you getting this error?
Hi Huw,
My Umbraco version is 11.1.0 and The error message occurs when is select any of the listed properties ( textarea , block grid), this problem is occur after upgrade project from v11.0.0 to v11.1.0
Have you tried deleting any temp folders etc. Could be a caching problem.
I had a 'Sequence contains more than one matching element' issue when I upgraded one of my projects recently but this was to do with the Forms module.
Perhaps the answer provided to me may help you in some way though.
https://our.umbraco.com/forum/using-umbraco-and-getting-started/110214-issue-with-umbraco-forms-after-upgrade-of-site-to-v1021
For anyone still looking for a solution, I have posted some notes on how I resolved this error in my situation in case it helps anyone.
https://our.umbraco.com/forum/using-umbraco-and-getting-started/109541-throws-an-error-while-adding-a-property-in-a-document-type#comment-344355
You can also get this error when selecting a plugin with the same alias in the package.manifest file.
I have experienced a similar problem and here is how I have fixed it. https://our.umbraco.com/packages/backoffice-extensions/doc-type-grid-editor/doc-type-grid-editor-feedback/64902-Can-we-use-doctype-compositions#comment-352571
is working on a reply...
This forum is in read-only mode while we transition to the new forum.
You can continue this topic on the new forum by tapping the "Continue discussion" link below.