You attempted an operation that required the referenced table to have a primary key. Examples of these operations include adding a foreign key, or using the ON EXISTING clause of an INSERT statement, while referring to a table that does not have a primary key. You must add a primary key to the referenced table.

• SQL Anywhere: Primary keys
• UltraLite: Creating UltraLite tables
• UltraLite: Primary key uniqueness in UltraLite