[Bug] Database content missing after restoring workspace from zip backup (exported with appflowy 0.13.02)

### Bug Description

I made a backup in the Appflowy client 0.13.02. downloaded the provided zip file, reimported it as a new workspace and got a long list of errors looking like the the following in the email notification already:
Imported with skipped items
31 database or document items were skipped.
Document: Unbenannt
ID: 0230a6b0-0dd1-5a56-b688-76139844b900
Document is not referenced by a database row

Looking at the workspace import once it had finished the main big database with content in was missing and not restored.
The title of the Workspace was missing and it did manage to recreate another database with three untitled rows (not turned into pages yet)

### How to Reproduce

see description

### Expected Behavior

restoring a backup should perfectly recreate the original workspace

### Operating System

Linux

### AppFlowy Version(s)

0.13.2

### Screenshots

_No response_

### Additional Context

_No response_