For the sake of the circuit, you’d better not use it.
Why? Obviously, the 100 ohm resistor is broken. In such a case, if you still try to use this broken 100 ohm resistor as a 30 ohms one, which is possible to cause the short circuit eventually.
High-quality and Low-cost
PCB Manufacturing Services
1 to 30 Layers
100% Electrical Testing
FR-4/Rogers/Teflon
Controlled Impedance