Reproduce steps:
create manualy DB2 Table via db2_engine_6.2.3.sql

Problem:
Engine throws exception

17.04.2013 11:15:35 org.activiti.engine.impl.interceptor.CommandContext close
SCHWERWIEGEND: Error while closing command context
org.activiti.engine.ActivitiException: Activiti database problem: no historyLevel property specified
at org.activiti.engine.impl.db.DbSqlSession.dbSchemaCheckVersion(DbSqlSession.java:723)
at org.activiti.engine.impl.db.DbSqlSession.performSchemaOperationsProcessEngineBuild(DbSqlSession.java:1086)
at org.activiti.engine.impl.SchemaOperationsProcessEngineBuild.execute(SchemaOperationsProcessEngineBuild.java:25)
at org.activiti.engine.impl.interceptor.CommandExecutorImpl.execute(CommandExecutorImpl.java:24)
at org.activiti.engine.impl.interceptor.CommandContextInterceptor.execute(CommandContextInterceptor.java:42)
at org.activiti.spring.SpringTransactionInterceptor$1.doInTransaction(SpringTransactionInterceptor.java:42)
at org.springframework.transaction.support.TransactionTemplate.execute(TransactionTemplate.java:131)
at org.activiti.spring.SpringTransactionInterceptor.execute(SpringTransactionInterceptor.java:40)
at org.activiti.engine.impl.interceptor.LogInterceptor.execute(LogInterceptor.java:32)
at org.activiti.engine.impl.ProcessEngineImpl.<init>(ProcessEngineImpl.java:77)