Errors on import-spweb

I ran export-spweb which finished with 0 warnings and 0 errors.

[2/9/2016 1:59:34 PM] Progress: Export completed.
[2/9/2016 1:59:34 PM] Finish Time: 2/9/2016 1:59:34 PM.
[2/9/2016 1:59:34 PM] Duration: 03:05:28
[2/9/2016 1:59:34 PM] Total Objects: 174321
[2/9/2016 1:59:34 PM] Finished with 0 warnings.
[2/9/2016 1:59:34 PM] Finished with 0 errors.

After an import-spweb to a new site collection, I have a list with a column that's not

[2/9/2016 8:10:36 PM] Verbose: Performing final fixups.
[2/9/2016 8:10:44 PM] Progress: Import completed.
[2/9/2016 8:10:44 PM] Finish Time: 2/9/2016 8:10:44 PM.
[2/9/2016 8:10:44 PM] Duration: 04:25:14
[2/9/2016 8:10:44 PM] Total Objects: 131980
[2/9/2016 8:10:44 PM] Finished with 11 warnings.
[2/9/2016 8:10:44 PM] Finished with 56274 errors.

Scanned the import log for errors:

[2/9/2016 7:50:00 PM] [ListItem] [9012_.000]   Debug:    at System.Guid..ctor(String g)
   at Microsoft.SharePoint.Deployment.ListItemSerializer.UpdateFieldData(SPListItem listItem, SPLoggerObject loggerObject, ImportObjectManager objectManager, Guid docId, String fieldName, String value, String value2, Guid gFieldId, Boolean& bCreated, Dictionary`2 brokenFields)
   at Microsoft.SharePoint.Deployment.ListItemSerializer.UpdateFieldData(SPListItem listItem, SPLoggerObject loggerObject, Guid docId, Boolean& bCreated, SPContentTypeId contentTypeId, ImportObjectManager objectManager, Object data)
   at Microsoft.SharePoint.Deployment.ListItemVersionSerializer.AddListItemVersion(SPWeb web, SPListItem listItem, SPLoggerObject loggerObject, Guid newId, Boolean editHistory, Boolean existsInDb, Boolean isFirst, Boolean isLast, Boolean isDocLib, StreamingContext context, XmlElement listItemData, SerializationInfoHelper listItemInfoHelper, String& listItemServerRelativeUrl, ISurrogateSelector selector)
   at Microsoft.SharePoint.Deployment.ListItemSerializer.UpdateListItemVersionData(SerializationInfoHelper infoHelper, SPWeb web, SPListItem& listItem, Guid newId, Boolean existsInDb, Boolean isDocLib, String& listItemServerRelativeUrl, StreamingContext context, ISurrogateSelector selector)
[2/9/2016 7:50:00 PM] [ListItem] [9013_.000] Progress: Importing
[2/9/2016 7:50:00 PM] [ListItem] [9013_.000]   Verbose: List URL: /depts/hr/Lists/hrRequests
[2/9/2016 7:50:00 PM] [ListItem] [9013_.000]   Error: Value cannot be null.
Parameter name: g

Any ideas?

Thanks,

Scott