Mismatched input error when creating Athena table

Question

Getting the following error,

line 1:8: mismatched input 'EXTERNAL'. Expecting: 'OR', 'SCHEMA', 'TABLE', 'VIEW'

when creating an Athena table with the following command,

CREATE EXTERNAL TABLE IF NOT EXISTS 'abcd_123' (Item:struct<Id:struct<S:string>>)
ROW FORMAT SERDE 'org.openx.data.jsonserde.JsonSerDe'
WITH SERDEPROPERTIES ('ignore.malformed.json' = 'true')
LOCATION 's3://mybucket'

I've gone through other Q&A's and none of the answers have helped me - any points as to where the error might be here ?