[BUG] pg_basebackup: error: backup failed: ERROR: requested WAL segment 00000002000001960000002A has already been removed failed with exit code 1

[JashBook]

Describe the bug
A clear and concise description of what the bug is.

To Reproduce
Steps to reproduce the behavior:

1. create cluster
2. load 500G data
3. loading 500G data and backup

kbcli cluster backup pg-cluster --method pg-basebackup   

4. see error

kubectl get pod 
NAME                                                              READY   STATUS      RESTARTS   AGE
dp-backup-0-backup-default-pg-cluster-20250213110918-4af495427n   2/2     Running     0          33m
dp-backup-0-backup-default-pg-cluster-20250213110918-4af49959kz   0/2     Error       0          3h30m

logs error pod

kubectl logs dp-backup-0-backup-default-pg-cluster-20250213110918-4af49959kz 
Defaulted container "backupdata" out of: backupdata, manager, dp-copy-datasafed (init)
Password: 
pg_basebackup: initiating base backup, waiting for checkpoint to complete
pg_basebackup: checkpoint completed
pg_basebackup: write-ahead log start point: 196/2A0000D0 on timeline 2
       84/595897141 kB (0%), 0/1 tablespace (-                                  )
2025/02/13 03:09:41 NOTICE: S3 bucket kbcli-test: Streaming uploads using chunk size 50Mi will have maximum file size of 488.281Gi
    49426/595897141 kB (0%), 0/1 tablespace (-                                  )
   114099/595897141 kB (0%), 0/1 tablespace (-                                  )
   175283/595897141 kB (0%), 0/1 tablespace (-                                  )
   234163/595897141 kB (0%), 0/1 tablespace (-                                  )
   288563/595897141 kB (0%), 0/1 tablespace (-                                  )
   347827/595897141 kB (0%), 0/1 tablespace (-                                  )
   409779/595897141 kB (0%), 0/1 tablespace (-                                  )
   468787/595897141 kB (0%), 0/1 tablespace (-                                  )
   528972/595897141 kB (0%), 0/1 tablespace (-                                  )
   596318/595897141 kB (0%), 0/1 tablespace (-                                  )
   658168/595897141 kB (0%), 0/1 tablespace (-                                  )
....
613763043/613763043 kB (100%), 0/1 tablespace (-                                  )
613843939/613843939 kB (100%), 0/1 tablespace (-                                  )
613933301/613933301 kB (100%), 0/1 tablespace (-                                  )
613933301/613933301 kB (100%), 1/1 tablespace                                         
pg_basebackup: error: backup failed: ERROR:  requested WAL segment 00000002000001960000002A has already been removed
failed with exit code 1

Expected behavior
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[wangyelei]

instead of wal-g. If using streaming backup as a replacement, it is necessary to back up to the data PVC first. Subsequent user demands need to be supported thereafter.