ExecuteSQLit sql=
insert into Tabs(ProjectId, TabName, AuthorizedRoles, ParentId, TabOrder, TabType, isVisible, TabOwner,TabTarget,Title) select '0','Home - -1','','1829', (select max(TabOrder)+1 from Tabs),'Book', '1','-1','/LucasCo/BookMarks.php',(select Title from Tabs where TabID='1')

Duplicate entry '0' for key 'PRIMARY'