How to solve conflict problems between Photon PUN 2 and Photon Voice 2?

I have imported Photon Voice 2 and Photon PUN 2 in a project, but now my editor accuses the following compiling error: Assets\Plugins\PhotonLoadbalancingApi\LoadBalancingPeer.cs(166,25): error CS0121: The call is ambiguous between the following methods or properties: 'PhotonPeer.SendOperation(byte, Dictionary<byte, object>, SendOptions)' and 'PhotonPeer.SendOperation(byte, ParameterDictionary, SendOptions)'

I can't solve this conflict since simply deleting one of the .cs files is not an option (I've already tried). Did anyone had the same issue? I believe it was caused by importing both Photon packages. Any tips on how to solve this are welcome. Thanks.

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