Indefinitely errors in SQL shell once a UNIQUE constraint has been violated

[Hydrocharged]

When using the SQL shell, if there is a UNIQUE constraint that is violated due to an INSERT, the table continues to fail for all future writes.

Repro:

$ dolt init
Successfully initialized dolt data repository.
$ dolt sql
# Welcome to the DoltSQL shell.
# Statements must be terminated with ';'.
# "exit" or "quit" (or Ctrl-D) to exit.
doltplay> CREATE TABLE person(
        ->   id INT NOT NULL PRIMARY KEY,
        ->   whole_name VARCHAR(50) UNIQUE,
        ->   age INT
        -> );
doltplay> INSERT INTO person(id, whole_name, age) VALUES 
        ->   (1, 'John Smith', 31),
        ->   (2, 'Jane Cooper', 42),
        ->   (3, 'Kate Lee', 25),
        ->   (4, 'Andrew Black', 37);
Query OK, 4 rows affected
doltplay> INSERT INTO person(id, whole_name, age) VALUES (5, 'tutu', 45);
Query OK, 1 row affected
doltplay> SELECT * FROM person;
+----+--------------+-----+
| id | whole_name   | age |
+----+--------------+-----+
| 1  | John Smith   | 31  |
| 2  | Jane Cooper  | 42  |
| 3  | Kate Lee     | 25  |
| 4  | Andrew Black | 37  |
| 5  | tutu         | 45  |
+----+--------------+-----+
doltplay> INSERT INTO person(id, whole_name, age) VALUES (6, 'tutu', 56);
Query OK, 1 row affected
failed to update indexes
doltplay> SELECT * FROM person;
+----+--------------+-----+
| id | whole_name   | age |
+----+--------------+-----+
| 1  | John Smith   | 31  |
| 2  | Jane Cooper  | 42  |
| 3  | Kate Lee     | 25  |
| 4  | Andrew Black | 37  |
| 5  | tutu         | 45  |
+----+--------------+-----+
doltplay> INSERT INTO person(id, whole_name, age) VALUES (6, 'somebody else', 67);
Query OK, 1 row affected
failed to update indexes
doltplay> SELECT * FROM person;
+----+--------------+-----+
| id | whole_name   | age |
+----+--------------+-----+
| 1  | John Smith   | 31  |
| 2  | Jane Cooper  | 42  |
| 3  | Kate Lee     | 25  |
| 4  | Andrew Black | 37  |
| 5  | tutu         | 45  |
+----+--------------+-----+