feature request #9511
Move specimens/individual associations for matrix into same description
If one adds a new specimen description in the matrix for a specimen that is not yet attached as individuals association always a new taxon description for this individuals association is created.
Better we should only create 1 taxon description for all individuals associations used in the matrix for the same taxon.
So we need a check if such a description already exists for the given taxon and the given DDS.