use a different calculation to determine initial partition

db_scripts/diff/11722_not_replicated.up

@@ -1,6 +1,6 @@
 use sipstats;
 alter table statistics remove partitioning;
-set @stm = concat('alter table statistics partition by range (floor(timestamp)) (partition p_old values less than (', unix_timestamp() + 600, '))');
+set @stm = concat('alter table statistics partition by range (floor(timestamp)) (partition p_old values less than (', coalesce((select floor(max(timestamp)) from statistics), 0) + 600, '))');
 prepare st from @stm;
 execute st;
 deallocate prepare st;