diff --git a/src/Processors/Formats/Impl/JSONEachRowRowInputFormat.cpp b/src/Processors/Formats/Impl/JSONEachRowRowInputFormat.cpp
index 11786269698..d73642fe3e1 100644
--- a/src/Processors/Formats/Impl/JSONEachRowRowInputFormat.cpp
+++ b/src/Processors/Formats/Impl/JSONEachRowRowInputFormat.cpp
@@ -380,10 +380,6 @@ void registerInputFormatJSONEachRow(FormatFactory & factory)
 
     factory.registerFileExtension("ndjson", "JSONEachRow");
     factory.registerFileExtension("jsonl", "JSONEachRow");
-    factory.registerFileExtension("ndjson", "JSONLines");
-    factory.registerFileExtension("jsonl", "JSONLines");
-    factory.registerFileExtension("ndjson", "NDJSON");
-    factory.registerFileExtension("jsonl", "NDJSON");
 
     factory.registerInputFormat("JSONStringsEachRow", [](
         ReadBuffer & buf,