Readwise can only be synced to one graph at a time. However, if the graph that it was synced to is removed, there is no way to reset the data to have it sync to a remaining graph.
This can be worked around by restoring the removed graph and re-linking in Logseq, but if that graph has been completely deleted and no longer in the recycle bin, it appears there's no other way to reset the connection to Readwise and sync highlights.
Readwise can only be synced to one graph at a time. However, if the graph that it was synced to is removed, there is no way to reset the data to have it sync to a remaining graph.
This can be worked around by restoring the removed graph and re-linking in Logseq, but if that graph has been completely deleted and no longer in the recycle bin, it appears there's no other way to reset the connection to Readwise and sync highlights.