When using version 1.2.0 (not 1.1.6) I get the following error:
Failed to load mods: Error while running setup for entity prototype "pump" (pump): next_upgrade target (bob-pump-2) must have the same fast_replaceable_group (pipe != pump).
This occurs when using both Space exploration and Krastorio 2. When using either of those mods separate it does not cause a conflict.