Issue Summary

Space import from Cloud to Server/DC breaks due to introduction of new field external_group_id in Content Permission

Steps to Reproduce

1. Take a space export from Cloud
2. Import it into Confluence server

Expected Results

Import should be successful

Actual Results

Import fails
The below exception is thrown in the atlassian-confluence.log file:

com.atlassian.confluence.importexport.ImportExportException: Unable to complete import: Error while importing backup: could not resolve property: groupExternalId of: com.atlassian.confluence.security.ContentPermission

Workaround

The workaround would be to replace all occurrences of groupExternalId. You can use below command to do that:

mv entities.xml entities.xml.orig
awk '{gsub("<property name=\"groupExternalId\"/>","")}1' entities.xml.orig > entities.xml
sed -i '/<property name="groupExternalId">/d' entities.xml

Then package entities.xml back into the original XML Zip and attempt the import again.