CWTKD0006E The task model with name ''`0`'' and process application or top level toolkit acronym ''`1`'' can not be deployed because another task model with the same name and process application or top level toolkit acronym but different target namespace already exists. The current target namespace is ''`2`''.

Explanation
Tasks with same name in several snapshots of a process application or toolkit must have the same target namespace.
User response
Depending on your scenario, adjust the target namespace to deploy a new version of an already installed task model or change the task name to install a new task model.