Lintian tag information: conflicting-negation-in-source-relation (type: error)

Description (from lintian-explain-tags)

The architecture string in this source relation has some negated
architectures (prepended by !) and others that are not negated. This is
not permitted by Policy. Either all architectures must be negated or none
of them may be.

Please refer to Syntax of relationship fields (Section 7.1) in the Debian
Policy Manual for details.

Visibility: error
Show-Always: no
Check: fields/package-relations

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