Unloading multiple NodeLink2 point graphs

Hi! I’m working on a top-down open-world game. The world consists of separated islands. I use GridGraphs for main pathfinding, but there are also NodeLink2 points, so that enemies could jump over the gaps on their island. This setup works fine if only one island at a time is loaded. If two islands are loaded simultaneously, and then one of them gets unloaded (with respective Grid- and PointGraph) I get this error which breaks pathfinding. Is there a safe way to unload one point graph without breaking another?