From OpenTMSWiki

The following Delete/Remove Functions are valid for MUL or MOL objects.

Screenshot 1 (red and yellow DB symbols)
delete the corresponding MUL or MOL in the database.

Screenshot 2 (red DB symbol)
deletes the chosen MUL. (from the unique id list)

Screenshot 3 (yellow DB symbol) 
deletes the chosen MOL from the MOL ids list.

Before MOL Delete

Screenshot 4

After MOL Delete

Screenshot 5

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