kniffel

When I try to add a new attribute with the Attribute Manager I get this error: -------- 1048 - Column 'price_prefix' cannot be null insert into products_attributes (products_id, options_id, options_values_id, options_values_price, price_prefix, products_options_sort_order) values ('29', '1', '15', '1', null, '1') [TEP STOP] --------- This error comes whatever I use plus or minus. I use the version AJAX-AttributeManager-V2.8.9 with disabled QT Pro. Thank's for your help.