Issue after making field unique

Hi friends,
I have a weird issue with customer doctype. First I made customer_name a unique field in customize form. and then when I again disable it as unique, the system is still remembering it as unique. I tried to restart, clear the cache but not working.

Anybody found a solution to this issue ?

I am experiencing the same problem on v13

bench migrate should fix the database

bench migrate did not fix this issue. I have a field that doesn’t even get deleted from the database on bench migrate after I delete the field. Is there something else I’m missing?