diff --git a/pageserver/src/pgdatadir_mapping.rs b/pageserver/src/pgdatadir_mapping.rs
index e749eaaafe..6876448cc7 100644
--- a/pageserver/src/pgdatadir_mapping.rs
+++ b/pageserver/src/pgdatadir_mapping.rs
@@ -2469,7 +2469,7 @@ impl DatadirModification<'_> {
             self.tline
                 .update_rel_size_v2_status(
                     reldir_migration_history.status.clone(),
-                    reldir_migration_history.v1_disabled_at,
+                    reldir_migration_history.v2_enabled_at,
                 )
                 .map_err(WalIngestErrorKind::RelSizeV2Error)?;
             self.put(
diff --git a/test_runner/regress/test_attach_tenant_config.py b/test_runner/regress/test_attach_tenant_config.py
index eaaa3014a5..3a90a72a98 100644
--- a/test_runner/regress/test_attach_tenant_config.py
+++ b/test_runner/regress/test_attach_tenant_config.py
@@ -183,7 +183,7 @@ def test_fully_custom_config(positive_env: NeonEnv):
         "lsn_lease_length": "1m",
         "lsn_lease_length_for_ts": "5s",
         "timeline_offloading": False,
-        "rel_size_v2_enabled": True,
+        "rel_size_v2_enabled": False,
         "relsize_snapshot_cache_capacity": 10000,
         "gc_compaction_enabled": False,
         "gc_compaction_verification": False,
@@ -194,6 +194,7 @@ def test_fully_custom_config(positive_env: NeonEnv):
             "numerator": 0,
             "denominator": 10,
         },
+        "rel_size_v1_access_disabled": True,
     }
 
     vps_http = env.storage_controller.pageserver_api()