i am doing the stability testing and monitring the system pressure throuth my millenium .

it is the impurity analysis during my analysis i observed that my system has got the bubble and there was afluctution in the presure and at the time of pressure drop there was no peak elution or no known imputity was eleting at this time so what should i considered . i should repeat this analysis or submit the same analysis so please help me. system was runnig with continue on fault system through millenium.