Upgrading from v2021 to v2025 error "key"

gets this error and generating stop

Initializing generation…
Checking extension files…
Loading codebase file…
Checking master/detail relationship…
Merging extensions…
Generating membership_kopcel_online_v2021187.json…
Error: An item with the same key has already been added.

i am upgrading from v2021 to v2025 .
kindsly advise

any chance to bypass this checking? I do not know to to check inside the db with hundres of tables and views

No, you cannot have duplicate table/view names (case-insensitive). You should click Tools → Synchronize your project with the database first, fix the table/view names according to the error messages, then generate scripts again.

i confirm that has no duplicate table name/views.

does table name with trailing given that error while generating?