{#7921, #9577, #2729, #1261, #8045, #8045, #1206, #8954, #3936, #8049, #8501, #8501, #8501, #8501, #4948, #8501, #4948, #7940, #4948, #9216, #9216}
The property is not clear.
It is defined on the generic feature object (#5252). View/Edit #5252.users