Grid submit form with unique field causes 500 when pressing submit

[steweiknowit]

tested on version 1.20251115.1

steps

1. some field defined with unique=True
2. on submit form (the default one) from grid add one row with some value on that field
3. try to add another row with the same value on that field
4. 500 page and error "sqlite3.IntegrityError: UNIQUE constraint failed" - similar result with pqsl (psycopg2)

• expecting a red warning text "unique field already has value" or similar on the field like other validations

kind regards
Stefan