And what does that relationship look like? What fields match? what calculations are you using? (how are they defined?)
I predict that one of the fields in e that are listed in manage | value lists is an unstored calculation field due to referencing data in a related table. Unstored calculation fields do not have an index and thus cannot be used as a value source for a value list. You'll need to figure out a way to set up either the calculation or a relationship to the table that avoids this issue.