SAP Table TKAZE - Activation of callup points for CO validation/substitution

Field Key Data Element Type Offset Leng Decimals Check Table Text
MANDT X MANDT CLNT 0 3 0 T000 Client
KOKRS X KOKRS CHAR 3 4 0 TKA01 Controlling Area
EVENT X VSEVENT NUMC 7 4 0 CO-Event in Validation or Substitution
ACTIV VSACTIV NUMC 11 1 0 Level of Activation for Validation Events
VALID VALID CHAR 12 7 0 GB93 Validation
SUBSTID SUBST_ID CHAR 19 7 0 GB92 Substitution name
SUBACTIV SSACTIV NUMC 26 1 0 Activation level for substitution callup points

392273When is validation/substitution called?
822063OK17 cannot be defined as "Current Setting"