These Actian PSQL v13 (32-bit) Workgroup Engines licenses are for new Workgroup Engine purchases, and allowing only upto a MAXIMUM of 5 concurrent users in any database engine. Note that if you have an existing 1 User or 3 Users system, then you can purchase additional 1 UCI and 2 UCI User Count Increases to reach the maximum of 5 concurrent users workgroup limitation.