We just encountered an XBRL validation error that we haven't seen before: "Concept is a child of itself." Wondering if anyone has seen this one and know how to resolve. The error description says "A concept in the outline is a child of itself. Right-click the child concept in the XBRL outline and select Remove."
Despite what the error text would imply, it doesn't point to any such situation where a concept has the same concept as a child of itself. The error points to a few spots on the XBRL outline where it seems to have issue with us having two tables in the same abstract that are both using an identical axis concept.
To be more specific, the error highlights 4 spots on the XBRL outline: Table 1, Axis under Table 1, Table 2, and Axis under Table 2.
We've tried multiple options to clear this, including deleting one of the axes or grouping the tables into separate abstracts, but that hasn't solved the problem.
Anyone have any thoughts or advice on this?