Can't use some of my knowledge indexes on my agents

[dusk jay]

For some reason, some knowledge indexes don't appear as index options to select when attaching files to my agents.
This is weird because a few days ago they were configured on agents but suddenly they are no longer configured and can't be selected either

[dusk jay]

Well apparently even tho it doesn't appear as configured ( or as an index option when configuring the file_search ) the agent is using the correct vector_store ( the one that corresponds to the index )