Invalid scripting for FK deleting using "IF OBJECTID('FK...', 'F') IS NOT NULL" check.
There is need to use schema as part of FK name. Reason: "OBJECT_ID() function returns NULL for "non-dbo schema" FK.

Bad script:
IF OBJECTID('FKFDlalala', 'F') IS NOT NULL
ALTER TABLE EE.FDlalala
DROP CONSTRAINT FKFDlalala
GO

Uber script:
IF OBJECTID('EE.FKFDlalala', 'F') IS NOT NULL
ALTER TABLE EE.FDlalala
DROP CONSTRAINT FKFDlalala
GO