version compatibility

Hello, is there a document anywhere that talks about forward compatibility
between different HSQL versions?

We have databases created with version hsqldb-2.3.2 that are yield errors
(an example below) when opening with 2.2.8.

at org.hsqldb.lib.HashMap.get(Unknown Source)
at org.hsqldb.SchemaManager.findSchemaObject(Unknown Source)
at org.hsqldb.SchemaManager.getSchemaObject(Unknown Source)
at org.hsqldb.ParserDQL.readTypeDefinition(Unknown Source)
at org.hsqldb.ParserDDL.readColumnDefinitionOrNull(Unknown Source)
at org.hsqldb.ParserDDL.compileCreateTableBody(Unknown Source)
at org.hsqldb.ParserDDL.compileCreateTable(Unknown Source)
at org.hsqldb.ParserDDL.compileCreate(Unknown Source)
at org.hsqldb.ParserCommand.compilePart(Unknown Source)
at org.hsqldb.ParserCommand.compileStatement(Unknown Source)
at org.hsqldb.Session.compileStatement(Unknown Source)
at org.hsqldb.scriptio.ScriptReaderText.readDDL(Unknown Source)
at org.hsqldb.scriptio.ScriptReaderBase.readAll(Unknown Source)
at org.hsqldb.persist.Log.processScript(Unknown Source)
at org.hsqldb.persist.Log.open(Unknown Source)
at org.hsqldb.persist.Logger.openPersistence(Unknown Source)
at org.hsqldb.Database.reopen(Unknown Source)
at org.hsqldb.Database.open(Unknown Source)
at org.hsqldb.DatabaseManager.getDatabase(Unknown Source)
at org.hsqldb.DatabaseManager.newSession(Unknown Source)
at org.hsqldb.jdbc.JDBCConnection.<init>(Unknown Source)
at org.hsqldb.jdbc.JDBCDriver.getConnection(Unknown Source)
at org.hsqldb.jdbc.JDBCDriver.connect(Unknown Source)

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