The naming of several exchanges and activities has changed from version 2 to version 3. Some exchanges have even been removed since a replacement is available or as they were combined with others or disaggregated.
The documentation "Change Report" as well as the "correspondence file" excel sheets for intermediate exchanges and for elementary flows can help you identify the exchange you are looking for.
Find here the Change report and correspondence file for different updated of ecoinvent.
Correspondence File & Change Report | version 2 to version 3.01