diff --git a/tools/check/forbidden_strings_in_code.txt b/tools/check/forbidden_strings_in_code.txt
index d46bdfa062..0ec15dead2 100644
--- a/tools/check/forbidden_strings_in_code.txt
+++ b/tools/check/forbidden_strings_in_code.txt
@@ -162,3 +162,6 @@ Formatter\.formatShortFileSize===1
 ### Use kotlin stdlib to test or compare strings
 # DISABLED
 # android\.text\.TextUtils
+
+### This is not a rule, but a warning: the number of "enum class" has changed. For Json classes, it is mandatory that they have `@JsonClass(generateAdapter = false)`. If it is ok, change the value in file forbidden_strings_in_code.txt
+enum class===69
\ No newline at end of file