As your initial problems at least might mean your SD is corrupted, I would not do this.
Start with a clean install (openHABian), access the running instance from your PC and only copy over those files you really have changed.
Preferrably don’t blindly copy but cross-check, then copy’n paste.
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@mstormi I’m just gonna leave it like it is, and (some day) start over with an all new Velbus-openHAB-RPi4.
Many thanks for the help and advice!