Need help with fastbootd

[ianspy1]

Hi I am really struggeling here ... Everytime I try to flash system it ends with
writing 'system_b' 2/3...
FAILED (remote: Operation not permitted)

my bootloader is unlocked and I am in fastbootd.

I so far tried:
- other USB cables
- other ROM´s
- factory wiping
- flashing stock image again (which does work in both fastboot and fastbootd)
- reflashing recovery with stock one
- relocking and unlocking
- booting in to fastbootd via command and buttons
- diffrent minimal adb and fastboot versions

anyone have any ideas what I am doing wrong?

[LogicalDrm]

-> Moved to Troubleshooting

[ianspy1]

On 12/23/2020 at 4:08 PM, LogicalDrm said:

-> Moved to Troubleshooting

Thx

[Krivas23]

Hello,

 

 

Sending sparse 'system_a' 1/6 (262140 KB)          OKAY [  7.812s]
Writing sparse 'system_a' 1/6                      OKAY [  1.291s]
Sending sparse 'system_a' 2/6 (262140 KB)          OKAY [  7.735s]
Writing sparse 'system_a' 2/6                      OKAY [  1.345s]
Sending sparse 'system_a' 3/6 (262140 KB)          OKAY [  7.645s]
Writing sparse 'system_a' 3/6                      OKAY [  1.295s]
Sending sparse 'system_a' 4/6 (262140 KB)          OKAY [  8.050s]
Writing sparse 'system_a' 4/6                      FAILED (remote: 'Operation not permitted')
Finished. Total time: 35.338s
 

Did you find a solution to this problem, do I have the same one as you?