Notice: Undefined index: widget in geofield_field_update_instance() (line 67 of geofield.module)

hi guys,

Bug just popped up, after enabling the Commerce Coupon Percentage Amount 7.x-1.x-dev module. Saving took very long and eventually ends up in showing a white page. When refreshing the page to admin/modules, i see a loooong list of 606 exactly the same notices: "Notice: Undefined index: widget in geofield_field_update_instance() (line 67 of /var/www/vhosts/test.nl/httpdocs/storedev/sites/default/modules/geofield/geofield.module).

I am unable to disable the coupon percentage module again, since i again get a white page with the same 606 errors.

Thanks for your assistance.

Leon