# S01020 {#s01020}

## Error Code {#error_code .section}

S01020

## Error Message {#error_message .section}

`The specified partitions must already exist in the database. RefId:S01020`

## Probable Causes {#probable_causes .section}

When performing backup by partition, if the partitions specified in *partition*of `backup` do not exist in the table, this error is thrown.

## Solutions {#solutions .section}

1.  Execute the `pnodeRun(getTabletsMeta)` command to check the existing partitions in the table.
2.  Modify the *partition*parameter of `backup`.

**Parent topic:**[Error Code Reference](../../Troubleshooting/ErrorCode.md)

