Flyway migration blocked by null version_rank

You upgraded from Flyway 3.x to 5.x, skipping 4.x. This is not possible as written in the release notes: https://flywaydb.org/documentation/releaseNotes#5.0.0

Upgrade to 4.2.0 first before upgrading to 5.x and everything will work as expected.

Also please take a minute to check the release notes next time you upgrade a major version.

Here's the commit with the metadata table changes if you need to apply the changes manually. I've linked to the version for postgres - search for the version of upgradeMetaDataTable.sql in the folder matching the required dialect.

Fortunately you can apply the changes as a standard flyway migration, as the metadata tables are not used until the end of each script.

E.G. create a migration V999.00__FlywayFix.sql to correct a flyway version table called flyway_table as follows:

DROP INDEX "flyway_table_vr_idx";
DROP INDEX "flyway_table_ir_idx";
ALTER TABLE "flyway_table" DROP COLUMN "version_rank";
ALTER TABLE "flyway_table" DROP CONSTRAINT "flyway_table_pk";
ALTER TABLE "flyway_table" ALTER COLUMN "version" DROP NOT NULL;
ALTER TABLE "flyway_table" ADD CONSTRAINT "flyway_table_pk" PRIMARY KEY ("installed_rank");
UPDATE "flyway_table" SET "type"='BASELINE' WHERE "type"='INIT';

it's worked for me for Postgres

CREATE TABLE flyway_schema_history (
  installed_rank INTEGER NOT NULL,
  version varchar(50) DEFAULT NULL,
  description varchar(200) NOT NULL,
  type varchar(20) NOT NULL,
  script varchar(1000) NOT NULL,
  checksum INTEGER DEFAULT NULL,
  installed_by varchar(100) NOT NULL,
  installed_on timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP,
  execution_time INTEGER NOT NULL,
  success BOOLEAN NOT NULL,
  PRIMARY KEY (installed_rank)
);

INSERT INTO flyway_schema_history (installed_rank, version, description,     type, script, checksum, installed_by, installed_on, execution_time, success)
SELECT installed_rank, version, description, type, script, checksum,     installed_by, installed_on, execution_time, success
FROM schema_version;

ALTER TABLE schema_version RENAME TO bak_schema_version;