These issues are due to H2 database engine changes in the new version. In the engine file, enable the H2 "LEGACY" mode by specifying this parameter: db.init.sql=SET MODE LEGACY

Also, the latest 3.15.13 release of SymmetricDS pays more attention to column sizes (TIMESTAMP). You can find it here: https://sourceforge.net/projects/symmetricds/files/symmetricds/symmetricds-3.15/