Note that this was NOT Q's previous Trip Code to authenticate a Drop as an actual Q drop. However, Q has changed Trop Codes in the past. The contents of the previous posts may indicate that Q is changing Trip Codes due to the old one being compromised. Those were Drop #1311 and #1312:
Drop #1311, using the old trip code, announces the TRIP is being updated. Then Drop #1312, using the new Trip Code, confirms it. Thus, we know it is Q doing the update and that the new TRIP CODE of "!2jsTvXXmXs" is confirmed as valid to identify a Drop as coming from Q.