Mattermost Boards is acting abnormal after update to 9.4

[Arjen]

• I have been looking at Mattermost for similar issues, but I could not find one myself.
• It does not involve security issues
• I pretty new to this type of stuff, so try to forgive me the stupid questions I will ask :)

Summary

After updating Mattermost/mattermost-team-edition:release-7.11 to Mattermost/mattermost-team-edition:release-9.4 suddenly Mattermost Boards is acting weird. Team boards are dissapearing in one account and they are still available in an other account. And downgrading does not resolve the issue (Or I am not downgrading in the correct way)

Steps to reproduce

Mattermost/mattermost-team-edition:release-9.4
postgres:15

1. Log:The database was created using collation version 2.31, but the operating system provides version 2.36.
2. I solved this message, by export and build a new database with a new version.

Expected behavior

Assuming it was a DB issue: after building a new database, I expected that this issues was not happening anymore
Assuming it is a Mattermost update issue: After downgrading it should be resolved.

Observed behavior (that appears unintentional)

What did you see happen? Please include relevant error messages and/or screenshots.

All boards started moving to the category boards and then they started to disappear

Suddenly Boards is not a plugin anymore, but a product

Possible fixes

I really don't know where to look.
Down here is a log snippet which occurs when opening boards

DBG api/boards.go:83 > timestamp=2023-12-12 21:08:01.935 Z msg=GetBoards product=boards teamID=jjr8aioa57fhxyzs6ypsbzoopr boardsCount=5
DBG api/blocks.go:158 > timestamp=2023-12-12 21:08:01.935 Z msg=GetBlocks product=boards boardID=barf9s8jky7y6irqed3ffstfc4e parentID= blockType= blockID= block_count=7
DBG ws/plugin_adapter.go:371 > timestamp=2023-12-12 21:08:01.936 Z msg=Command not implemented in plugin mode product=boards command=SUBSCRIBE_TEAM webConnID=4hazupn7jf88mnic6ucdr4wdoh userID=3aqi4e9f5jgd7rdrbqbfdgbfny teamID=jjr8aioa57fhxyzs6ypsbzoopr
DBG ws/plugin_adapter.go:371 > timestamp=2023-12-12 21:08:01.938 Z msg=Command not implemented in plugin mode product=boards command=SUBSCRIBE_TEAM webConnID=4hazupn7jf88mnic6ucdr4wdoh userID=3aqi4e9f5jgd7rdrbqbfdgbfny teamID=jjr8aioa57fhxyzs6ypsbzoopr
DBG api/templates.go:88 > timestamp=2023-12-12 21:08:01.938 Z msg=GetTemplates product=boards teamID=jjr8aioa57fhxyzs6ypsbzoopr boardsCount=2
DBG app/plugin_requests.go:200 > timestamp=2023-12-12 21:08:01.938 Z msg=CSRF Check failed for request - Please migrate your plugin to either send a CSRF Header or Form Field, XMLHttpRequest is deprecated path=/plugins/boards/api/v2/teams/jjr8aioa57fhxyzs6ypsbzoopr/categories/75tx4p6thzing7j3cbznb6ikqqr/boards/barf9s8jky7y6irqed3ffstfc4e ip=172.17.0.1:56198 session_id=gm4wyd45ij8ujecehqxhpk4dgw user_id=3aqi4e9f5jgd7rdrbqbfdgbfny
DBG api/auth.go:337 > timestamp=2023-12-12 21:08:01.939 Z msg=attachSession product=boards single_user=false
ERR api/api.go:187 > timestamp=2023-12-12 21:08:01.944 Z msg=category ID specified in input does not exist for user product=boards
ERR api/api.go:204 > timestamp=2023-12-12 21:08:01.944 Z msg=API ERROR product=boards code=500 error=category ID specified in input does not exist for user api=/api/v2/teams/jjr8aioa57fhxyzs6ypsbzoopr/categories/75tx4p6thzing7j3cbznb6ikqqr/boards/barf9s8jky7y6irqed3ffstfc4e
DBG api/auth.go:337 > timestamp=2023-12-12 21:08:01.970 Z msg=attachSession product=boards single_user=false
DBG api/members.go:74 > timestamp=2023-12-12 21:08:01.975 Z msg=GetMembersForBoard product=boards boardID=barf9s8jky7y6irqed3ffstfc4e membersCount=2
DBG app/plugin_requests.go:200 > timestamp=2023-12-12 21:08:01.987 Z msg=CSRF Check failed for request - Please migrate your plugin to either send a CSRF Header or Form Field, XMLHttpRequest is deprecated path=/plugins/boards/api/v2/teams/jjr8aioa57fhxyzs6ypsbzoopr/users ip=172.17.0.1:56196 session_id=gm4wyd45ij8ujecehqxhpk4dgw user_id=3aqi4e9f5jgd7rdrbqbfdgbfny
DBG api/auth.go:337 > timestamp=2023-12-12 21:08:01.987 Z msg=attachSession product=boards single_user=false