Reply to both @raffe and @adrb04
The original thread on this topic has a post that explains the background of this bug a bit.
https://community.ipfire.org/t/log-summary-openvpn-no-crl-update/11816/7
So after updating with Core Update 187 when is has its full release (It went to Testing phase a couple of days ago) then everyone will have the fix applied to their systems.
Anyone updating to Core Update 186 since about 3 days ago will also get the fix as it was applied to the Core 186 updater.
https://community.ipfire.org/t/log-summary-openvpn-no-crl-update/11816/11
Core Update 187 is likely to get its full release by end of July or a bit earlier (dependent on if any issues fed back during the testing phase) so as you have updated your CRL you will have a period of a month before the next update is required by which time Core Update 187 will have been released and after update you will have the updated openvpn-crl-updater script installed so the updates will be getting done automatically again.