hi , have you tried with this command ?

ALTER TABLE [tbl_audit_master]

DROP CONSTRAINT [PK_tbl_audit_master_1__13] WITH (MOVE TO SECONDARY)

then

ALTER TABLE [tbl_audit_master]

ADD CONSTRAINT [PK_tbl_audit_master_1__13] PRIMARY KEY CLUSTERED

( [log_id] ASC

)WITH (IGNORE_DUP_KEY...