Deleting installer partition fails

I made an installation on eMMC and the new remove code fails to remove the deleteme partition:

Mount boot partition (/dev/mmcblk2p1) to /boot (read-only)
Extract /boot/initramfs-postmarketos-allwinner-extra
32180 blocks
First boot after running on-device installer - deleting old install partition: /dev/mmcblk2p3
Error: Could not stat device /dev/mmcblk2p - No such file or directory.
Error: Could not stat device /dev/mmcblk2p - No such file or directory.
Check/repair root filesystem (/dev/mmcblk2p2)
e2fsck 1.45.6 (20-Mar-2020)
pmOS_root: recovering journal
Setting free inodes count to 57963 (was 57965)
Setting free blocks count to 62456 (was 62451)
pmOS_root: clean, 23797/81760 files, 264456/326912 blocks
Resize root filesystem (/dev/mmcblk2p2)
resize2fs 1.45.6 (20-Mar-2020)
The filesystem is already 326912 (4k) blocks long.  Nothing to do!

Mount root partition (/dev/mmcblk2p2) to /sysroot (read-only)