I followed the installation guide and installed it correctly, and no errors occurred in the Unity Editor,
but when I tried to build in CI, the conflict error occurred.
[2026-01-08T10:04:59.943Z]
[2026-01-08T10:04:59.943Z] D:\workspace\FORPIPELINECHECK\####.cs(105,27): error CS0433: The type 'MessagePackSerializationException' exists in both 'MessagePack.SourceGenerator, Version=3.1.4.0, Culture=neutral, PublicKeyToken=b4a0369545f0a1be' and 'MessagePack, Version=3.1.4.0, Culture=neutral, PublicKeyToken=b4a0369545f0a1be'
[2026-01-08T10:04:59.943Z]
[2026-01-08T10:04:59.943Z] MessagePack.SourceGenerator\MessagePack.SourceGenerator.MessagePackGenerator\Formatters.MessagePack.GeneratedMessagePackResolver.####.g.cs(150,18): error CS0433: The type 'AutomataKeyGen' exists in both 'MessagePack.SourceGenerator, Version=3.1.4.0, Culture=neutral, PublicKeyToken=b4a0369545f0a1be' and 'MessagePack, Version=3.1.4.0, Culture=neutral, PublicKeyToken=b4a0369545f0a1be'
[2026-01-08T10:04:59.943Z]
[2026-01-08T10:04:59.943Z] MessagePack.SourceGenerator\MessagePack.SourceGenerator.MessagePackGenerator\Formatters.MessagePack.GeneratedMessagePackResolver.####.g.cs(154,22): error CS0433: The type 'AutomataKeyGen' exists in both 'MessagePack.SourceGenerator, Version=3.1.4.0, Culture=neutral, PublicKeyToken=b4a0369545f0a1be' and 'MessagePack, Version=3.1.4.0, Culture=neutral, PublicKeyToken=b4a0369545f0a1be'
[2026-01-08T10:04:59.943Z]
[2026-01-08T10:04:59.943Z] MessagePack.SourceGenerator\MessagePack.SourceGenerator.MessagePackGenerator\Formatters.MessagePack.GeneratedMessagePackResolver.####.g.cs(160,26): error CS0433: The type 'AutomataKeyGen' exists in both 'MessagePack.SourceGenerator, Version=3.1.4.0, Culture=neutral, PublicKeyToken=b4a0369545f0a1be' and 'MessagePack, Version=3.1.4.0, Culture=neutral, PublicKeyToken=b4a0369545f0a1be'
When using MessagePack v3.1.4 in a Unity project,
the build fails with a CS0433 type conflict error.
I followed the installation guide and installed it correctly, and no errors occurred in the Unity Editor,
but when I tried to build in CI, the conflict error occurred.
Is there any guide on how to try to solve this?