I have created a new custom admin module. and the module has an entity and a translation entity.

While I am trying to add a new entry other than the default language

I am getting the following error

         "detail":"Translation required for system language 2fbb5fe2e29a4d70aa5854ce7ce3e20b",
         "template":"Translation required for system language {{ systemLanguage }}",
               "{{ systemLanguage }}":"2fbb5fe2e29a4d70aa5854ce7ce3e20b"

I have fixed the issue by resetting the language to the default language while creating a new entry to the entity.

Like the following