SQL Database upload error

Hello – one of my old domains & hosting expired and unfortunately I lost the site (got no warning from the account…grr). I have a SQL file backup of the site, and I followed the instructions to upload it from here:

http://codex.wordpress.org/Restoring_Your_Database_From_Backup

All goes well until I get this very long winded error message.
Error:

SQL query: Documentation

— — Dumping data for table wp_customcontactforms_fields — INSERT INTO wp_customcontactforms_fields (id, field_slug, field_label, field_type, field_value, field_maxlength, user_field, field_instructions, field_options, field_required, field_class, field_error, field_max_upload_size, field_allowed_file_extensions) VALUES (1, ‘captcha’, ‘Type the numbers.’, ‘Text’, ”, 100, 0, ‘Type the numbers displayed in the image above.’, ‘a:0:{}’, 0, ”, ”, 0, ”), (2, ‘recaptcha’, ”, ‘Text’, ”, 100, 0, ‘Type the numbers displayed in the image above.’, ‘a:0:{}’, 0, ”, ”, 0, ”), (3, ‘usaStates’, ‘Select a State’, ‘Dropdown’, ”, 0, 0, ”, ‘a:0:{}’, 0, ”, ”, 0, ”), (4, ‘allCountries’, ‘Select a Country’, ‘Dropdown’, ”, 0, 0, ”, ‘a:0:{}’, 0, ”, ”, 0, ”), (5, ‘ishuman’, ‘Check if you are human.’, ‘Checkbox’, ‘1’, 0, 0, ‘This helps us prevent spam.’, ‘a:0:{}’, 0, ”, ”, 0, ”), (6, ‘fixedEmail’, ‘Your Email’, ‘Text’, ”, 100, 0, ‘Please enter your email[…]

MySQL said: Documentation
#1062 – Duplicate entry ‘1’ for key ‘PRIMARY’

Does anyone have any clue why this wouldn’t work for me?