Oracle Bundle Patch Ended with conflict error

Hi Experts,

When i am applying the latest bundle patch for the month of august for oracle12c DB it's ended with conflict error. Please let me know how to fix this.

Current bundle version:        SBP 12.1.0.2.2 201503

While apply and found error: SBP 12.1.0.2.4 201508

Already tried the remaining previous version interim patches as well (May, June, and August) but there is no luck.

Please guide me.

Thanks,

Narasimhan K