diff -r 784b24381bed -r b6d71e504294 src/server/plugins/postgresql/vfs.c
--- a/src/server/plugins/postgresql/vfs.c	Sun May 08 19:29:27 2022 +0200
+++ b/src/server/plugins/postgresql/vfs.c	Sun May 08 19:31:38 2022 +0200
@@ -134,7 +134,7 @@
 // Update resource metadata
 // params: $1: resource_id
 //         $2: contentlength
-static const char *sql_update_resource = "update Resource set contentlength = $2, lastmodified = now() where resource_id = $1;";
+static const char *sql_update_resource = "update Resource set contentlength = $2, lastmodified = now(), etag = gen_random_uuid() where resource_id = $1;";
 
 // Delete a resource
 // params: $1: resource_id