FreeMarker syntax is invalid.

For "!" right-hand operand: Expected a boolean, but this has evaluated to a string (wrapper: f.t.SimpleScalar):
==> "" [in template "template_id" at line 62, column 44]

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FTL stack trace ("~" means nesting-related):
- Failed at: #assign uuid = m?groups[7]!!"" [in template "template_id" at line 62, column 15]
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