Reference: Drop Procedure.
The code:
DROP PROCEDURE IF EXISTS procedureName;
...
Edit:
Can you try to rename the procedure and then try to drop it as per this post: Rename a mysql procedure?
try this:
UPDATE `mysql`.`create_DataTable`
SET name = '<new_proc_name>',
specific_name = '<new_proc_name>'
WHERE db = '<database>' AND
name = '<old_proc_name>';
Also note: If have granted privileges to users for this procedure you will need to update the procedure name in newProcedure as well.
UPDATE `mysql`.`create_DataTable`
SET Routine_name = '<new_proc_name>'
WHERE Db = '<database>' AND
Routine_name = '<old_proc_name>';
FLUSH PRIVILEGES;
Do you have the freedom to delete all procedures? If so please try out this post: Drop all stored procedures in MySQL or using temporary stored procedures and post2: Drop all stored procedures in MySQL or using temporary stored procedures.