by mutual consent has this meaning

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意

By mutual consent, the negotiators kept off political differences, and concentrated on the military issue.
意，谈判政治歧而集讨论问题。
When problems or potential violations are uncovered, they are usually resolved quietly by mutual consent.
旦问题潜违，般都意私解。
We inform you that the partnership lately existing between us and Mr. Aoki, under the style of Messrs. Aoki& Co., has been dissolved by mutual consent.
6、青木先青木司营合，，意解散，特通告。