Some properties are mutually exclusive of each other and require that only one property in the mutually exclusive set be unsuppressed. The addition or removing of the suppression for one of these properties automatically suppresses the other mutually exclusive properties.

For example, defining Bilinear Isotropic Hardening and Multilinear Isotropic Hardening for the same material represents redundant plasticity behavior. Only one behavior can be active for the material. When such a conflict occurs, the property defined last is used and the previously defined, conflicting property is automatically suppressed.