Using V7 on unix with product_variant_multi, I am trying to create a dimension type for handling size.

I open the Diemnsion Type creation menu : Warehourses > Products > Products Categories > Variant Dimension > Dimension Types. I filled all possible field of the form : Dimension & Description, checked : allow custom value & mandatory, Left "sequence" field with its default value : 0, add a Dimension option.

But I having the error :

Integrity Error
The operation cannot be completed, probably due to the following:
- deletion: you may be trying to delete a record while other records still reference it
- creation/update: a mandatory field is not correctly set
[object with reference: product_tmpl_id - product.tmpl.id]

What step did I missed ? I suspect the "random" value keyed into the Dimension option to be wrong. Does his value has to refer to something else ? I already tried to put the name of an option, but it doesn't work.

Regards, St.