Kyro Serializer not getting set : Spark3

[rajat kumar]

Hello Users,

While using below setting getting exception
  spark.conf.set("spark.serializer",
"org.apache.spark.serializer.KryoSerializer")

User class threw exception: org.apache.spark.sql.AnalysisException: Cannot
modify the value of a Spark config: spark.serializer at
org.apache.spark.sql.errors.QueryCompilationErrors$.cannotModifyValueOfSparkConfigError(QueryCompilationErrors.scala:2322)

Can we safely skip setting it or is there any changed way?

Thanks
Rajat