An Automerge job will fail if there is a large number of trust-enabled columns. The exact number of columns that cause the job to fail is variable and based on the length of the column names and the number of trust-enabled columns. Long column names are at—or close to—the maximum allowable length of 26 characters. To avoid this problem, keep the number of trust-enabled columns below 40 and/or the length of the column names short.