After making some unsupported SQL modyfications I got exception during importing solution.
First of all enable tracing, it has almost all info about exceptions, which says:
Crm Exception: Message: No RowGuid attribute defined for shareable/publishable entity ProductPriceLevel, ErrorCode: -2147220970,
InnerException: Microsoft.Crm.CrmException: No RowGuid attribute defined for shareable/publishable entity ProductPriceLevel.
After undoing SQL changes everything came back to normal.
I’ve same situation with importing solution when:
There was a text field with schema name new_team.
This field has been removed, and created txt field with the same schema name but CRM gave this new field different GUID.