SAP Message R1773 - No time constraint: &1 already exists &2 &3 &4

Diagnosis
There is no time constraint for the BP relationship/role definition. Inother words, the important thing is that the BP relationship/roledefinition exists, but not at which times.
The 'Valid from' and 'Valid to' dates are set by the system to aminimum and maximum date.
The BP relationship/role definition already exists with this validityperiod. You cannot create an additional validity interval.

System Response
Error message