I am trying to write a report that extract a custom field with custom property type of ‘l’ which is no longer listed but was part of 5.5 for system fields.

In any case it fills a “LOOKUP VALUE ID” which I am trying to look up but the data schema only say

“The value of a Custom System lookup field.Introduced in assyst10 SP5.5.” What table(s) are associated with custom System Lookup?