Dropping primary key causes error in POMELO_BEFORE_DROP_PRIMARY_KEY

[hrabatom]

I need to rename a table mapped to an entity. I generated a migration, which first run.
The migration runs migrationBuilder.DropPrimaryKey first, but this fail while running POMELO_BEFORE_DROP_PRIMARY_KEY, with error

Failed executing DbCommand (12ms) [Parameters=[], CommandType='Text', CommandTimeout='30']
DROP PROCEDURE IF EXISTS `POMELO_BEFORE_DROP_PRIMARY_KEY`;
CREATE PROCEDURE `POMELO_BEFORE_DROP_PRIMARY_KEY`(IN `SCHEMA_NAME_ARGUMENT` VARCHAR(255), IN `TABLE_NAME_ARGUMENT` VARCHAR(255))
BEGIN
	DECLARE HAS_AUTO_INCREMENT_ID TINYINT(1);
	DECLARE PRIMARY_KEY_COLUMN_NAME VARCHAR(255);
	DECLARE PRIMARY_KEY_TYPE VARCHAR(255);
	DECLARE SQL_EXP VARCHAR(1000);
	SELECT COUNT(*)
		INTO HAS_AUTO_INCREMENT_ID
		FROM `information_schema`.`COLUMNS`
		WHERE `TABLE_SCHEMA` = (SELECT IFNULL(SCHEMA_NAME_ARGUMENT, SCHEMA()))
			AND `TABLE_NAME` = TABLE_NAME_ARGUMENT
			AND `Extra` = 'auto_increment'
			AND `COLUMN_KEY` = 'PRI'
			LIMIT 1;
	IF HAS_AUTO_INCREMENT_ID THEN
		SELECT `COLUMN_TYPE`
			INTO PRIMARY_KEY_TYPE
			FROM `information_schema`.`COLUMNS`
			WHERE `TABLE_SCHEMA` = (SELECT IFNULL(SCHEMA_NAME_ARGUMENT, SCHEMA()))
				AND `TABLE_NAME` = TABLE_NAME_ARGUMENT
				AND `COLUMN_KEY` = 'PRI'
			LIMIT 1;
		SELECT `COLUMN_NAME`
			INTO PRIMARY_KEY_COLUMN_NAME
			FROM `information_schema`.`COLUMNS`
			WHERE `TABLE_SCHEMA` = (SELECT IFNULL(SCHEMA_NAME_ARGUMENT, SCHEMA()))
				AND `TABLE_NAME` = TABLE_NAME_ARGUMENT
				AND `COLUMN_KEY` = 'PRI'
			LIMIT 1;
		SET SQL_EXP = CONCAT('ALTER TABLE `', (SELECT IFNULL(SCHEMA_NAME_ARGUMENT, SCHEMA())), '`.`', TABLE_NAME_ARGUMENT, '` MODIFY COLUMN `', PRIMARY_KEY_COLUMN_NAME, '` ', PRIMARY_KEY_TYPE, ' NOT NULL;');
		SET @SQL_EXP = SQL_EXP;
		PREPARE SQL_EXP_EXECUTE FROM @SQL_EXP;
		EXECUTE SQL_EXP_EXECUTE;
		DEALLOCATE PREPARE SQL_EXP_EXECUTE;
	END IF;
END;
MySqlConnector.MySqlException (0x80004005): Cannot load from mysql.proc. The table is probably corrupted

We're using Pomelo.EntityFrameworkCore.MySql 7.0.0 and can't upgrade yet to 8.0.2.
Related to #1828?