Problem updating rockon list

I have added a json file at /opt/rockstor/rockons-metastore/. After an update of this file I can see the string changes, but it doesn’t affect the default ports of the install dialog. They always stay the same as in the first file I uploaded.

I also can’t remove the entry by removing the json from /opt/rockstor/rockons-metastore/. I also tried to remove the rockon share with no success.

How can I force rockstor to completely reload the rockon list (yes I tried the normal update button)?

Btw. I’m using 3.8-11 stable.