diff --git a/data/apps/cvtt_musvc_sim.cfg b/data/apps/cvtt_musvc_sim.cfg
index b4a3d76..8acbe7f 100644
--- a/data/apps/cvtt_musvc_sim.cfg
+++ b/data/apps/cvtt_musvc_sim.cfg
@@ -109,7 +109,8 @@
         "app_status_channel": "${GLOBAL_CHANNEL_PREFIX}.OHLCV_RECORDER_STATUS"
         , "historical_md": {
             "db": {
-                "cred_key": "TSDB-CLD32-PROD-OHLCV-DCKR"
+                # "cred_key": "TSDB-CLD32-TESTER-DCKR-CMPS"
+                "cred_key": "TSDB-CLD32-TESTER-DCKR-CMPS"
             }
             , "trades_recording": { # unconditional trades recording for 1min aggregates
                 "flush_interval_sec": 5.0