The successful bootstrap draws are 250. In 233 bootstrap draws the LRT is bigger than the observed LRT value (so the algorithm does not care if the likelihood was replicated, even if it was not replicated adding more random starts would make it only bigger which is not of interest because it is already bigger than the observed value and it would not affect the p-value computation in any way).
Actually, the warning message is completely irrelevant in your case. Your p-value is already 0.93. Adding more random starts could potentially only increase this p-value but that has no impact on the inference because very clearly the 6-class solution could not be rejected in favor of a 7-class solution.