Coverity #1141005 #1141006

src/knot/server/zones.c

@@ -983,7 +983,6 @@ static uint32_t zones_next_serial(knot_zone_t *zone)
 	assert(zone);
 
 	uint32_t old_serial = knot_zone_serial(knot_zone_contents(zone));
-	assert(old_serial >= 0);
 	uint32_t new_serial;
 
 	switch (zones_serial_policy(zone)) {

src/libknot/dnssec/zone-sign.c

@@ -1107,7 +1107,7 @@ int knot_zone_sign_update_soa(const knot_rrset_t *soa,
 	}
 
 	if (policy->soa_up == KNOT_SOA_SERIAL_UPDATE) {
-		assert(new_serial >= 0);
+		;
 	} else {
 		assert(policy->soa_up == KNOT_SOA_SERIAL_KEEP);
 		new_serial = serial;