I installed a column in my 6890/5975 inert GC-MS and when I did an autotune the tuning process stopped and there was an error message that the Entrance Lens was above the maximum of 64. The instrument had been used by another person for a two sequences. When that person ran an autotune on 3/13/19 the Ent Lens voltage was 19.07. On 3/15/19 the Ent Lens voltage was 63. The repeller and EM voltage did not change from the 13th to the 15th to today. What happened to cause such a large increase in the Entrance Lens voltage?