Error when creating membership level

Creating a membership level fails systematically. Debug info is as follows:


2023-1-03 17:40:05 - Failed inserting new membership level into database. Args: array (
'name' => 'Annual membership',
'description' => 'Paid annually',
'duration' => '1',
'duration_unit' => 'year',
'trial_duration' => 0,
'trial_duration_unit' => 'day',
'price' => '100',
'fee' => '10',
'maximum_renewals' => 0,
'after_final_payment' => '',
'list_order' => 0,
'level' => '1',
'status' => 'active',
'role' => 'subscriber',
'maximum_renewals_setting' => 'forever',
'rcp-action' => 'add-level',
'rcp_add_level_nonce' => 'd3432b9a09',
'_wp_http_referer' => '/wp-admin/admin.php?page=rcp-member-levels&rcp_message=level_not_added',
)