text: alter table ACT_RU_TASK 
      add CATEGORY_ varchar(255);
      
  alter table ACT_RU_EXECUTION drop constraint act_ru_execution_proc_def_id__business_key__key;
  
  alter table ACT_RE_DEPLOYMENT 
      add TENANT_ID_ varchar(255) default '';  
      
  alter table ACT_RE_PROCDEF 
      add TENANT_ID_ varchar(255) default ''; 
      
  alter table ACT_RU_EXECUTION
      add TENANT_ID_ varchar(255) default '';       
      
  alter table ACT_RU_TASK
      add TENANT_ID_ varchar(255) default '';  
      
  alter table ACT_RU_JOB
      add TENANT_ID_ varchar(255) default '';   
      
  alter table ACT_RE_MODEL
      add TENANT_ID_ varchar(255) default '';
      
  alter table ACT_RU_EVENT_SUBSCR
     add TENANT_ID_ varchar(255) default ''; 
     
  alter table ACT_RU_EVENT_SUBSCR
     add PROC_DEF_ID_ varchar(64);       
      
  alter table ACT_RE_PROCDEF
      drop constraint ACT_UNIQ_PROCDEF;
      
  alter table ACT_RE_PROCDEF
      add constraint ACT_UNIQ_PROCDEF
      unique (KEY_,VERSION_, TENANT_ID_);  
  
  update ACT_GE_PROPERTY set VALUE_ = '5.15' where NAME_ = 'schema.version';
  