SQL 2012 :: Creating Snapshot From Mirror Database Failed - Could Not Redo Log Record

Process to create snapshot failed (twice per day snapshot of the database is being created for some people to work on). Morning snapshot worked fine but the afternoon one failed. The snapshot is being created from Mirror database. I used this code:

CREATE DATABASE [DB_snapshot] ON
(name = N'DB',filename = N'D:SnapshotDB.SQLSnapshot' )
,(name = N'indexes',filename = N'D:SnapshotDB_indexes.SQLSnapshot' )
AS SNAPSHOT OF DB

And the error message i get

Msg 1823, Level 16, State 6, Line 1
A database snapshot cannot be created because it failed to start.
Msg 1823, Level 16, State 7, Line 1
A database snapshot cannot be created because it failed to start.
Msg 3456, Level 21, State 1, Line 1
Could not redo log record (202011:19306:2), for transaction ID (0:0), on page (1:1823948), allocation unit 281474979397632, database 'DB_snapshot' (database ID 6). Page: LSN = (201954:220201:1), allocation unit = 281474979397632, type = 1. Log: OpCode = 4, context 18, PrevPageLSN: (202010:23679:1). Restore from a backup of the database, or repair the database.
Msg 3313, Level 21, State 1, Line 1

During redoing of a logged operation in database 'DB_snapshot', an error occurred at log record ID (202011:19306:2). Typically, the specific failure is previously logged as an error in the Windows Event Log service. Restore the database from a full backup, or repair the database.

What might be causing this error? Mirroring seems to be working OK. status is "Synchronized"