--- a/hgext/sqlitestore.py	Thu Feb 18 17:36:52 2021 +0100
+++ b/hgext/sqlitestore.py	Thu Feb 18 18:18:35 2021 +0100
@@ -288,6 +288,7 @@
     baserevisionsize = attr.ib()
     revision = attr.ib()
     delta = attr.ib()
+    sidedata = attr.ib()
     linknode = attr.ib(default=None)
 
 
@@ -908,6 +909,10 @@
     def files(self):
         return []
 
+    def sidedata(self, nodeorrev, _df=None):
+        # Not supported for now
+        return {}
+
     def storageinfo(
         self,
         exclusivefiles=False,