SELECT
	CONCAT_WS(
		',',
		SUBSTRING_INDEX(
			'1,2,3,11,13',
			',',
			FIND_IN_SET('1', '1,2,3,11,13') + (
				CHAR_LENGTH('1,2,3,11,13') - CHAR_LENGTH(
					REPLACE ('1,2,3,11,13', ',', '')
				) - 1
			) - (
				CHAR_LENGTH('1,2,3,11,13') - CHAR_LENGTH(
					REPLACE ('1,2,3,11,13', ',', '')
				)
			)
		),
		'NEW VALUE',
		SUBSTRING_INDEX(
			'1,2,3,11,13',
			',',
			FIND_IN_SET('1', '1,2,3,11,13') - 1 - (
				CHAR_LENGTH('1,2,3,11,13') - CHAR_LENGTH(
					REPLACE ('1,2,3,11,13', ',', '')
				)
			)
		)
	)