Try to split the statement. For example, replace
insert Table1 values
( 1, 2, 3 ),
( 4, 5, 6 ),
( 7, 8, 9 )
with
insert Table1 values
( 1, 2, 3 ),
( 4, 5, 6 )
insert Table1 values
( 7, 8, 9 )
Each fragment should not exceed the maximum allowed number of 1000 row values.