I get a pile of errors when I run it - Cannot insert the value NULL into column 'Seq'.

I eventually worked out that this is because I have ANSI_NULL_DFLT_ON set to False, so Seq was added as a Not Null column.

This never normally affects me, as I always specify NULL or NOT NULL and don't rely on a default, but can anyone point me in the direction of where this might be set?