I may managed to make a clean install, at least I have rebooted to Philz, but I can't mount sdcard1. This has happened at my first install, Philz can't mount sdcard1, Twrp can mount, backup, restore but gives error while flashing new Rom.Not really, it depends on the entry point (or boot hijack) of the other recovery package. If they are both replacing the same binary to introduce recovery boot, the chance is that it will work fine...
In your case, see if your previous package maintainer has a removal tool or instructions on how to remove that recovery.
Can you please help me with mounting sdcard1 in Philz?
edit1:
Things are confusing here.
Good news: after "clean" installing xzdualrecovery I have now newer version of twrp and it solved all my problems.
Weird: I have booted to Twrp again instead of Philz(volume up). And philz mount problem is true.
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