# Troubleshooting: Import trials

Error message ID10107: The source experiment has different hardware

This occurs when the Device ID of the hardware devices declared in the experiment settings (Device Configuration window) differ between the experiments. Or, if the names are the same but the devices ID have been mapped to different arenas. For example, when Lickometer 1 was assigned to Arena 1 in the current experiment, and in Arena 2 in the experiment you want to import the trials from.

Unfortunately there is no way to re-assign Devices ID post-acquisition. Always make sure to use the same names and mapping criteria when creating new experiments that you want to merge.