Unable to pick up Trudy's token, Killavolt

So I`ve taken this mission and killed Trudy. Just by chance token fell under the floor in the crack inside the platform. Here it is:

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I was trying to reach it multiple times but it seems not to be possible. The toxic water around the pier doesn’t make it simpler. Any solutions? As I can see restarting the mission is not possible.

Yup happened to me & my wife on first play through. We just left the map/zone & returned and the token was sitting on top of the docks