duplicate entry at key primary mysql

My program is really simple it inserts the same value in one column and updates the timestamp and date on another column. It also has an auto incrementing ID column that acts as the table's primary key.

+-------+------------+------+-----+-------------------+-----------------------------+
| Field | Type       | Null | Key | Default           | Extra                       |
+-------+------------+------+-----+-------------------+-----------------------------+
| id    | bigint(20) | NO   | PRI | NULL              | au开发者_StackOverflow社区to_increment              |
| Power | float      | YES  |     | NULL              |                             |
| dt    | timestamp  | NO   |     | CURRENT_TIMESTAMP | on update CURRENT_TIMESTAMP |
+-------+------------+------+-----+-------------------+-----------------------------+

at the moment I'm stuck with id = 4000 Power = 40996 and dt = recent date time

As soon as i try to run a command that inserts data into the table, I get an error that states

duplicate entry '4971' for key 'primary'

check table:

+----------------+-------+----------+-----------------------------------------------------------+
| Table          | Op    | Msg_type | Msg_text                                                  |
+----------------+-------+----------+-----------------------------------------------------------+
| newdb.newmeter | check | warning  | Table is marked as crashed                                |
| newdb.newmeter | check | warning  | 19 clients are using or haven't closed the table properly |
| newdb.newmeter | check | warning  | Size of datafile is: 68816       Should be: 68663         |
| newdb.newmeter | check | error    | Found 4048 keys of 4039                                   |
| newdb.newmeter | check | error    | Corrupt                                                   |
+----------------+-------+----------+-----------------------------------------------------------+

Backup your data. If you can afford to shutdown mysqld you should do it and use myisamchk to repair table. If it is not an option try doing FLUSH TABLES; and REPAIR TABLE newmeter; Be prepared for data in your table being not very accurate.