[Err] 1136 - Column count doesn't match value count at row 1
this error shows that one column has changed its data type for ex. from text to longint.
change each insert to:
INSERT INTO `custom_npc` ('id', 'idtemplate', 'name', 'serversidename', 'title', 'serversidetitle', 'class', 'collision_radius', 'collision_height', 'level', 'sex','type') VALUES ('90100', '30181', 'Aramiss', '1', 'Weapon Shop', '1', 'NPC.a_traderA_MHuman', '10.00', '24.00', '80', 'male', 'L2Merchant');
But beware of the Values. remove all values after the type of the npc. that should work if they are merchants or npc not monsters.