diff -r 358737abeeef -r 3d740058b467 hgext/remotefilelog/remotefilelog.py
--- a/hgext/remotefilelog/remotefilelog.py	Wed Jan 20 18:35:12 2021 +0100
+++ b/hgext/remotefilelog/remotefilelog.py	Mon Jan 18 11:44:51 2021 +0100
@@ -155,12 +155,12 @@
         # text passed to "addrevision" includes hg filelog metadata header
         if node is None:
             node = storageutil.hashrevisionsha1(text, p1, p2)
-        if sidedata is None:
-            sidedata = {}
 
         meta, metaoffset = storageutil.parsemeta(text)
         rawtext, validatehash = flagutil.processflagswrite(
-            self, text, flags, sidedata=sidedata
+            self,
+            text,
+            flags,
         )
         return self.addrawrevision(
             rawtext,