diff --git a/storage/rocksdb/ha_rocksdb.cc b/storage/rocksdb/ha_rocksdb.cc
index 48108f9d409..2b6ba2616d8 100644
--- a/storage/rocksdb/ha_rocksdb.cc
+++ b/storage/rocksdb/ha_rocksdb.cc
@@ -9553,7 +9553,7 @@ int ha_rocksdb::update_pk(const Rdb_key_def &kd,
     }
   }
 
-  if (table->next_number_field) {
+  if (table->found_next_number_field) {
     update_auto_incr_val_from_field();
   }
 
diff --git a/storage/rocksdb/mysql-test/rocksdb/r/autoinc_vars.result b/storage/rocksdb/mysql-test/rocksdb/r/autoinc_vars.result
index 8cc9b070a70..0c496227006 100644
--- a/storage/rocksdb/mysql-test/rocksdb/r/autoinc_vars.result
+++ b/storage/rocksdb/mysql-test/rocksdb/r/autoinc_vars.result
@@ -150,3 +150,11 @@ CREATE TABLE t0(c0 BLOB) ENGINE=ROCKSDB;
 INSERT INTO t0 VALUES(0);
 ALTER TABLE t0 AUTO_INCREMENT=0;
 DROP TABLE t0;
+#---------------------------------------------------------------
+# MDEV-16703 Assertion failed in load_auto_incr_value_from_index
+#---------------------------------------------------------------
+CREATE TABLE t1 (pk INT AUTO_INCREMENT, a INT, PRIMARY KEY(pk)) ENGINE=RocksDB;
+INSERT INTO t1 (a) VALUES (1);
+UPDATE t1 SET pk = 3;
+ALTER TABLE t1 AUTO_INCREMENT 2;
+DROP TABLE t1;
diff --git a/storage/rocksdb/mysql-test/rocksdb/t/autoinc_vars.test b/storage/rocksdb/mysql-test/rocksdb/t/autoinc_vars.test
index 9d7f0365d07..86a0a7f2a53 100644
--- a/storage/rocksdb/mysql-test/rocksdb/t/autoinc_vars.test
+++ b/storage/rocksdb/mysql-test/rocksdb/t/autoinc_vars.test
@@ -116,3 +116,13 @@ CREATE TABLE t0(c0 BLOB) ENGINE=ROCKSDB;
 INSERT INTO t0 VALUES(0);
 ALTER TABLE t0 AUTO_INCREMENT=0;
 DROP TABLE t0;
+
+--echo #---------------------------------------------------------------
+--echo # MDEV-16703 Assertion failed in load_auto_incr_value_from_index
+--echo #---------------------------------------------------------------
+
+CREATE TABLE t1 (pk INT AUTO_INCREMENT, a INT, PRIMARY KEY(pk)) ENGINE=RocksDB;
+INSERT INTO t1 (a) VALUES (1);
+UPDATE t1 SET pk = 3;
+ALTER TABLE t1 AUTO_INCREMENT 2;
+DROP TABLE t1;