Split off from issue #4227. When setting or modifying the svn:externals property, it is possible to specify multiple entries for the same path. Example: svn propget svn:externals trunk https://svn-server:8080/svn/multi/extfolder1 barf https://svn-server:8080/svn/multi/extfolder2 barf Only one entry per path ('barf') should be allowed. Issue #4227 covers the warning during propset/propedit. This issue is about warning about duplicates in svn:externals props coming in from the server during checkout, update, merge.
Original issue reported by neels