BitLocker metadata for the encrypted drive is not valid (0x80310010) - bitlocker

Question

I'm moving an external drive to a new computer.
The drive is protected with Bitlocker, but I can unlock it and view the contents.
However, when I try to configure auto-unlock I see:
C:\>manage-bde -autounlock -enable d:
BitLocker Drive Encryption: Configuration Tool version 10.0.17763
Copyright (C) 2013 Microsoft Corporation. All rights reserved.
ERROR: An error occurred (code 0x80310010):
The BitLocker metadata for the encrypted drive is not valid. You can attempt to repair the drive to restore access.
Is there a way to rebuild the metadata?
Clearly the metadata is valid enough to unlock the volume, so I'm wondering if the error message is even correct.

Answer 1

Further investigation revealed that the error message was incorrect.
The cause of the problem was that the disk was marked as readonly.
After using diskpart to clear the readonly flag, then locking and unlocking the volume, manage-bde -autounlock -enable d: worked correctly.
C:\>diskpart
Microsoft DiskPart version 10.0.17763.1554
Copyright (C) Microsoft Corporation.
On computer: HYPER-V
DISKPART> list volume
Volume ### Ltr Label Fs Type Size Status Info
---------- --- ----------- ----- ---------- ------- --------- --------
Volume 0 C NTFS Partition 465 GB Healthy Boot
Volume 1 Recovery NTFS Partition 499 MB Healthy Hidden
Volume 2 FAT32 Partition 100 MB Healthy System
Volume 3 D DATA ReFS Partition 7449 GB Healthy
DISKPART> select volume 3
Volume 3 is the selected volume.
DISKPART> attributes disk
Current Read-only State : Yes
Read-only : Yes
Boot Disk : No
Pagefile Disk : No
Hibernation File Disk : No
Crashdump Disk : No
Clustered Disk : No
DISKPART> attributes disk clear readonly
Disk attributes cleared successfully.
DISKPART> exit
C:\>manage-bde -lock d:
BitLocker Drive Encryption: Configuration Tool version 10.0.17763
Copyright (C) 2013 Microsoft Corporation. All rights reserved.
Volume D: is now locked
C:\>manage-bde -unlock d: -pw
BitLocker Drive Encryption: Configuration Tool version 10.0.17763
Copyright (C) 2013 Microsoft Corporation. All rights reserved.
Enter the password to unlock this volume:
The password successfully unlocked volume D:.
C:\>manage-bde -autounlock -enable d:
BitLocker Drive Encryption: Configuration Tool version 10.0.17763
Copyright (C) 2013 Microsoft Corporation. All rights reserved.
Key Protectors Added:
External Key:
ID: {3CEFC24B-BBBF-4818-A128-9FA0E87E872D}
External Key File Name:
3CEFC24B-BBBF-4818-A128-9FA0E87E872D.BEK
Automatic unlock enabled.