diff --git a/src/core.c b/src/core.c
index d6711fb9..f1c670ad 100644
--- a/src/core.c
+++ b/src/core.c
@@ -13811,7 +13811,7 @@ static int mdbx_setup_dbx(MDBX_dbx *const dbx, const MDBX_db *const db,
 static int mdbx_fetch_sdb(MDBX_txn *txn, MDBX_dbi dbi) {
   MDBX_cursor_couple couple;
   if (unlikely(TXN_DBI_CHANGED(txn, dbi))) {
-    mdbx_notice("dbi %u was changed", dbi);
+    mdbx_notice("dbi %u was changed for txn %" PRIaTXN, dbi, txn->mt_txnid);
     return MDBX_BAD_DBI;
   }
   int rc = mdbx_cursor_init(&couple.outer, txn, MAIN_DBI);
@@ -13821,16 +13821,25 @@ static int mdbx_fetch_sdb(MDBX_txn *txn, MDBX_dbi dbi) {
   MDBX_dbx *const dbx = &txn->mt_dbxs[dbi];
   rc = mdbx_page_search(&couple.outer, &dbx->md_name, 0);
   if (unlikely(rc != MDBX_SUCCESS)) {
-    mdbx_notice("dbi %u refs to inaccessible subDB (err %d)", dbi, rc);
+  notfound:
+    mdbx_notice("dbi %u refs to inaccessible subDB `%*s` for txn %" PRIaTXN
+                " (err %d)",
+                dbi, (int)dbx->md_name.iov_len,
+                (const char *)dbx->md_name.iov_base, txn->mt_txnid, rc);
     return (rc == MDBX_NOTFOUND) ? MDBX_BAD_DBI : rc;
   }
 
   MDBX_val data;
   struct node_result nsr = mdbx_node_search(&couple.outer, &dbx->md_name);
-  if (unlikely(!nsr.exact))
-    return MDBX_BAD_DBI;
+  if (unlikely(!nsr.exact)) {
+    rc = MDBX_NOTFOUND;
+    goto notfound;
+  }
   if (unlikely((node_flags(nsr.node) & (F_DUPDATA | F_SUBDATA)) != F_SUBDATA)) {
-    mdbx_notice("dbi %u refs to not a named subDB (%s)", dbi, "wrong flags");
+    mdbx_notice(
+        "dbi %u refs to not a named subDB `%*s` for txn %" PRIaTXN " (%s)", dbi,
+        (int)dbx->md_name.iov_len, (const char *)dbx->md_name.iov_base,
+        txn->mt_txnid, "wrong flags");
     return MDBX_INCOMPATIBLE; /* not a named DB */
   }
 
@@ -13841,7 +13850,10 @@ static int mdbx_fetch_sdb(MDBX_txn *txn, MDBX_dbi dbi) {
     return rc;
 
   if (unlikely(data.iov_len != sizeof(MDBX_db))) {
-    mdbx_notice("dbi %u refs to not a named subDB (%s)", dbi, "wrong rec-size");
+    mdbx_notice(
+        "dbi %u refs to not a named subDB `%*s` for txn %" PRIaTXN " (%s)", dbi,
+        (int)dbx->md_name.iov_len, (const char *)dbx->md_name.iov_base,
+        txn->mt_txnid, "wrong rec-size");
     return MDBX_INCOMPATIBLE; /* not a named DB */
   }
 
@@ -13850,9 +13862,11 @@ static int mdbx_fetch_sdb(MDBX_txn *txn, MDBX_dbi dbi) {
    * have dropped and recreated the DB with other flags. */
   MDBX_db *const db = &txn->mt_dbs[dbi];
   if (unlikely((db->md_flags & DB_PERSISTENT_FLAGS) != md_flags)) {
-    mdbx_notice("dbi %u refs to the re-created subDB with different flags "
-                "(present 0x%x != wanna 0x%x)",
-                dbi, db->md_flags & DB_PERSISTENT_FLAGS, md_flags);
+    mdbx_notice("dbi %u refs to the re-created subDB `%*s` for txn %" PRIaTXN
+                " with different flags (present 0x%X != wanna 0x%X)",
+                dbi, (int)dbx->md_name.iov_len,
+                (const char *)dbx->md_name.iov_base, txn->mt_txnid,
+                db->md_flags & DB_PERSISTENT_FLAGS, md_flags);
     return MDBX_INCOMPATIBLE;
   }