Hi!
This sounds like a minor database inconsistency. Try the following steps:
1. Open up all the search instances you have created and save them without changing anything: https://i.imgur.com/tSs0Voz.png
2. Open up the Cache Settings and save them without changing anything: https://i.imgur.com/vqNnZzX.png
Let me know if anything changes, or if you get different error messages.
Best,Ernest Marcinko
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