Hi @jahwag,
you’re using the standard edition, and the standard edition has a low message vpn limit - as documented here:
Editions of the Software Event Broker
If you need 4 message vpns you can either use multiple standard editions or use the enterprise edition (where a license is required).
BTW: In your docker compose file, version 9.4 is used… You should change this to 9.13. (but this wont change anything on the number of message vpns you can use).
Uli