keychain access message won't stop popping up

After updating to Ventura in December, I started getting a recurring "Reminders wants to use your confidential information..." message. (Specifically, "Reminders wants to use your confidential information stored in 'CalendarApps Access Group' in your keychain.")

I input my keychain password and click "always allow" but the message continues to pop up. I'll input my password, and the message will pop up again almost instantaneously. (Every once in a while, it will go away for a period of time. Before suddenly coming back again.)

I've "solved" the problem by moving the pop up to the far bottom of my screen, but this is not an ideal solution.

I asked a question about this on this forum in December and received one suggestion about editing the "Lock after" check box. (Just updated to Ventura: getting recurrin… - Apple Community) But that didn't fix the issue. (I was not surprised that it didn't. The "Lock after" suggestion appears to be aimed at fixing a recurring request for the login keychain password. In my situation, I'm not being asked for the login password; Reminders is asking to access information stored in my keychain.)

I should add that I opened the keychain app and searched for CalendarApps Access, thinking that maybe I could just delete that keychain item, but nothing came up.

Any advice for fixing this increasingly maddening issue is very much appreciated!