V0.31 Save Dashboard Error

After some change, I cannot save the dashboard. See picture.

I am also experiencing the same issue. Version Metabase 0.31.2

It’s difficult without a full error message, but I’m pretty sure it’s fixed by PR #9219, which is included in the upcoming 0.32.0
0.32.0-RC1 was released yesterday: https://github.com/metabase/metabase/releases/tag/v0.32.0-RC1
Always do backups before upgrading.