I have taken advice from my service provider a copy of their reply is

I have checked the table, zen_zones of the database brideand_zencecs. From your update, I understood that you are trying to insert an additional row into the table zen_zones.

The error you got since the zone_id 182 already exists in the table:

--
mysql> select * from zen_zones where zone_id=182;
+---------+-----------------+-----------+------------------------------+
| zone_id | zone_country_id | zone_code | zone_name |
+---------+-----------------+-----------+------------------------------+
| 182 | 13 | ACT | Australian Capital Territory |
+---------+-----------------+-----------+------------------------------+
--

To insert one row into the table you have to use the following query:

INSERT INTO zen_zones VALUES ('zone_id', 'zone_country_id', 'zone_code', 'zone_name');

The last entry's zone id in the table is 519. If you wanted to add new entry, then the zone id value should be 520. Then the query should be:

INSERT INTO `zen_zones` VALUES (520, 222, 'Bedfordshire', 'Bedfordshire');

I have made no changes my database to zen_zones so do you know why there is a conflict with Australian Capital? Could it be a conflict with another plugin that I have used?