org.apache.spark.sql.catalyst.analysis.UnresolvedException: Invalid call to datatype. Can not resolve due to differing types DoubleType, IntegerType on unresolved object, tree: (CAST(key#3, DoubleType) / 2)

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Invalid call to datatype. Can not resolve due to differing types DoubleType, IntegerType on unresolved object, tree: (CAST(key#3, DoubleType) / 2)
org.apache.spark.sql.catalyst.analysis.UnresolvedException: Invalid call to datatype. Can not resolve due to differing types DoubleType, IntegerType on unresolved object, tree: (CAST(key#3, DoubleType) / 2)
at org.apache.spark.sql.catalyst.expressions.BinaryArithmetic.dataType(arithmetic.scala:62)
at org.apache.spark.sql.catalyst.analysis.HiveTypeCoercion$Division$$anonfun$apply$9.applyOrElse(HiveTypeCoercion.scala:351)
at org.apache.spark.sql.catalyst.analysis.HiveTypeCoercion$Division$$anonfun$apply$9.applyOrElse(HiveTypeCoercion.scala:346)
at org.apache.spark.sql.catalyst.trees.TreeNode.transformDown(TreeNode.scala:144)

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