DFS1734I SC=08 DUPLICATE STACK IDENTIFIER. PREVIOUS STACK DELETED; CURRENT STACK IN EFFECT

Explanation
 A STACK ON statement was encountered that specified
the identifier of a stack that currently existed in real storage.

System action
 The stack that currently exists in real storage
is deleted, and stacking is initiated for the STACK ON statement encountered.

Programmer response
 Specify unique identifiers for all stacks
that currently exist in real storage.