Failure migrating wiki to Mountain Lion Server with wikiadmin, value is out of range for type integer

We are trying to migrate our 10.6.8 wikis from the OS X Server to our new Mountain Lion OS X Server. I am using "wikiadmin migration -r <collaboration directory> -g <wiki name>" to migrate each wiki individually. We have about 30 wikis in the old server, three of which fail to migrate, all with the same problem (below). The process runs successfully for a while, but ultimately fails and rolls back the transaction. It appears there is some problem trying to generate a unique filename, perhaps for some of the uploaded files?

Has anyone else seen this error? large amount of pages, content, and attachments in these wikis and just recreating them in the new server would be a monumental task. Some of these attachments include videos and other large files, not sure if that might contribute to the problem.

=== wikiadmin migrate output log ===

Aug 29 13:25:11 gslcwiki.local wikiadmin[54032] <Debug>: [PGCConnection:233 7e7e1180 +0ms] Executing query [INSERT INTO entity (uid, tiny_id, entity_type_fk, short_name, long_name, description, create_time, update_time, createdby_user_fk, updatedby_user_fk, ownedby_uid_fk, owner_entity_type_fk, is_hidden) (SELECT uid, tiny_id, entity_type_fk, short_name, long_name, description, create_time, update_time, createdby_user_fk, updatedby_user_fk, ownedby_uid_fk, owner_entity_type_fk, is_hidden FROM master_entity_scratch_20120829T132314 WHERE entity_type_fk='com.apple.entity.File')]

Aug 29 13:25:11 gslcwiki.local wikiadmin[54032] <Debug>: [PGCConnection:181 7e7e1180 +151ms] Query result is [PGRES_FATAL_ERROR] rows returned=0/updated=

Aug 29 13:25:11 gslcwiki.local wikiadmin[54032] <Error>: [PGCConnection:148 7e7e1180 +0ms] Error in TXN: Error executing query [INSERT INTO entity (uid, tiny_id, entity_type_fk, short_name, long_name, description, create_time, update_time, createdby_user_fk, updatedby_user_fk, ownedby_uid_fk, owner_entity_type_fk, is_hidden) (SELECT uid, tiny_id, entity_type_fk, short_name, long_name, description, create_time, update_time, createdby_user_fk, updatedby_user_fk, ownedby_uid_fk, owner_entity_type_fk, is_hidden FROM master_entity_scratch_20120829T132314 WHERE entity_type_fk='com.apple.entity.File')]: ERROR: value "109120715161" is out of range for type integer

CONTEXT: PL/pgSQL function "uniquify_filename" line 7 at RETURN

PL/pgSQL function "trg_update_entity_filename" line 23 at assignment

(

0 CoreFoundation 0x00007fff93b67716 __exceptionPreprocess + 198

1 libobjc.A.dylib 0x00007fff95aaf470 objc_exception_throw + 43

2 PostgreSQLClient 0x00000001026ff9ae -[PGCConnection checkResultOK:forSQL:] + 360

3 PostgreSQLClient 0x00000001026ffec3 -[PGCConnection executeQuery:] + 223

4 wikiadmin 0x000000010269d586 wikiadmin + 66950

5 PostgreSQLClient 0x00000001026ff5f7 -[PGCConnection transactionInBlock:onError:] + 147

6 wikiadmin 0x000000010269cd86 wikiadmin + 64902

7 wikiadmin 0x00000001026a025d wikiadmin + 78429

8 wikiadmin 0x00000001026924c8 wikiadmin + 21704

9 libdyld.dylib 0x00007fff912857e1 start + 0

10 ??? 0x0000000000000006 0x0 + 6

)

Aug 29 13:25:11 gslcwiki.local wikiadmin[54032] <Debug>: [PGCConnection:320 7e7e1180 +0ms] Executing update [ROLLBACK]