Columns Set to "Available" in Connection Explorere by Default?

Hi there, I was curious if there is a known reason why one column “_CUSTKEY_” always seems to get set to “Available” instead of “Included”

Turns out, this is due to the leading underscore which Sigma defaults to Available!

Another potential reason a column would be marked “Available” by default is if it is a linked column. You can check the links tab of table explorer to confirm if this is the case

Added Connection