diff --git a/apps/dmt/src/dmt_author_database.erl b/apps/dmt/src/dmt_author_database.erl
index 5c2a57e..6035fa6 100644
--- a/apps/dmt/src/dmt_author_database.erl
+++ b/apps/dmt/src/dmt_author_database.erl
@@ -30,7 +30,7 @@ insert(Worker, Name, Email) ->
         {ok, 1, _Columns, [{ID, false}]} ->
             {ok, {already_exists, ID}};
         {error, Error} ->
-            logger:error("Insert Author error Name: ~p Email ~p Error ~p", [Name, Email, Error]),
+            logger:debug("Insert Author error Name: ~p Email ~p Error ~p", [Name, Email, Error]),
             {error, unknown}
     end.
 
diff --git a/apps/dmt/src/dmt_database.erl b/apps/dmt/src/dmt_database.erl
index 384776e..7c19351 100644
--- a/apps/dmt/src/dmt_database.erl
+++ b/apps/dmt/src/dmt_database.erl
@@ -887,7 +887,7 @@ get_related_graph(
 ) ->
     case get_related_graph_edges(Worker, ObjectRef, Version, Depth, IncludeInbound, IncludeOutbound) of
         {ok, {EntityIds, Edges}} ->
-            logger:error("EntityIds: ~p, Edges: ~p", [EntityIds, Edges]),
+            logger:debug("EntityIds: ~p, Edges: ~p", [EntityIds, Edges]),
             get_objects_and_filter(Worker, EntityIds, Version, TypeFilter, Edges, ObjectRef);
         {error, Reason} ->
             logger:error("Error in graph edge traversal for ~p: ~p", [ObjectRef, Reason]),
@@ -909,7 +909,7 @@ get_objects_and_filter(Worker, EntityIds, Version, TypeFilter, Edges, ObjectRef)
         {ok, AllNodes} ->
             FilteredNodes = filter_nodes_by_type(AllNodes, TypeFilter),
             FilteredEdges = filter_edges_by_nodes(Edges, FilteredNodes),
-            logger:error("FilteredNodes: ~p, FilteredEdges: ~p", [FilteredNodes, FilteredEdges]),
+            logger:debug("FilteredNodes: ~p, FilteredEdges: ~p", [FilteredNodes, FilteredEdges]),
             {ok, {FilteredNodes, FilteredEdges}};
         {error, Reason} ->
             logger:error("Error fetching objects for graph ~p: ~p", [ObjectRef, Reason]),
@@ -934,10 +934,10 @@ filter_nodes_by_type(Nodes, FilterType) ->
 
 -spec filter_edges_by_nodes([edge()], [dmt_object:object()]) -> [edge()].
 filter_edges_by_nodes(Edges, Nodes) ->
-    logger:error("filter_edges_by_nodes Edges: ~p, Nodes: ~p", [Edges, Nodes]),
+    logger:debug("filter_edges_by_nodes Edges: ~p, Nodes: ~p", [Edges, Nodes]),
     lists:filter(
         fun(#{source_ref := SourceRef, target_ref := TargetRef}) ->
-            logger:error("Filter SourceRef: ~p, TargetRef: ~p", [SourceRef, TargetRef]),
+            logger:debug("Filter SourceRef: ~p, TargetRef: ~p", [SourceRef, TargetRef]),
             lists:any(
                 fun(#{id := NodeId}) ->
                     NodeId =:= SourceRef
diff --git a/apps/dmt/src/dmt_repository.erl b/apps/dmt/src/dmt_repository.erl
index 5688409..51d2a3e 100644
--- a/apps/dmt/src/dmt_repository.erl
+++ b/apps/dmt/src/dmt_repository.erl
@@ -707,7 +707,7 @@ validate_no_references_to_entities(Worker, RemovedObjectsReferences, Version) ->
 -spec validate_no_references_to_entity(dmt_database:worker(), object_ref(), dmt_object:version()) -> ok | no_return().
 validate_no_references_to_entity(Worker, Ref, Version) ->
     Ref1 = dmt_mapper:ref_to_string(Ref),
-    _ = logger:warning("Validating no references to entity ~p at version ~p", [Ref, Version]),
+    _ = logger:debug("Validating no references to entity ~p at version ~p", [Ref, Version]),
     case dmt_database:get_referenced_by(Worker, Ref1, Version) of
         {ok, []} ->
             ok;
@@ -759,7 +759,7 @@ insert_object(Worker, Type, ID0, Version, Data0) ->
         ok ->
             ID0;
         {error, Reason} ->
-            logger:error(
+            logger:debug(
                 "insert_object Type: ~p, ID: ~p, Version: ~p, Data: ~p, SearchVector: ~p",
                 [Type, ID0, Version, Data1, SearchVector]
             ),