Hi importing a DB into a new USER space and get
. . importing table "ACTION_HARVEST_DETAIL" 10039 rows imported
IMP-00015: following statement failed because the object already exists:
"ALTER TABLE "ACTION_HARVEST_DETAIL" ADD CONSTRAINT "PK_ACTION_HARVEST_DETA"
"IL" PRIMARY KEY ("ACTION_HARVEST_DETAIL_ID") USING INDEX PCTFREE 10 INITRAN"
"S 2 MAXTRANS 255 STORAGE(INITIAL 393216 NEXT 131072 MINEXTENTS 1 MAXEXTENTS"
" 4096 PCTINCREASE 0 FREELISTS 1 FREELIST GROUPS 1 BUFFER_POOL DEFAULT) TABL"
"ESPACE "USERS" ENABLE "


BUT

I get
About to enable constraints...
IMP-00017: following statement failed with ORACLE error 2430:
"ALTER TABLE "ACTION_HARVEST_DETAIL" ENABLE CONSTRAINT "PK_ACTION_HARVEST_DETAIL""

When 2430 is
ORA-02430 cannot enable constraint (string) - no such constraint
Cause: The named constraint does not exist for this table.
Action: Check that a constraint exists before trying to enable it.

Why? is it there or not there?

(this happens for about 45% of the constraints)