Release target fails trying to delete tag.

[crackmac]

When performing a "grunt release" everything goes smoothly until the task tries to delete a tag with the SNAPSHOT version. I don't see where this tag is getting set either.

[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESSFUL
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 12 minutes 11 seconds
[INFO] Finished at: Sun Mar 23 22:13:15 PDT 2014
[INFO] Final Memory: 7M/374M
[INFO] ------------------------------------------------------------------------
Deployed ui-web-0.4.0.zip to https://nexus.myhouse.com/nexus/content/repositories/MYHOUSE

Running "maven:version:0.5.0-SNAPSHOT:deleteTag" (maven:version) task
Version bumped to 0.5.0-SNAPSHOT
Deleting tag v0.5.0-SNAPSHOT...ERROR
>> Failed to delete tag v0.5.0-SNAPSHOT
Warning: error: tag 'v0.5.0-SNAPSHOT' not found. Use --force to continue.

Aborted due to warnings.

Is there a step I'm missing?