我已经在Access数据库工作了几年。几乎突然之间，其中一种形式变得无法编辑，我收到消息“此记录集不可更新”。我在任何表上都看不到任何丢失的主键。这是一个非常简单的表单，数据来自少量表和一些子表单，我无法弄清楚问题。
有人可以帮忙吗？
这是SQL：
SELECT tblGraduateCourseInformation.COMMENTS,
tblGraduateCourseInformation.ScholarshipComments,
tblGraduateCourseInformation.CollegeAdvisor,
tblGraduateCourseInformation.Supervisor, tblCurrentStudents.[Preferred Forename],
tblCurrentStudents.[Programme Title], tblCurrentStudents.[Programme Type],
tblCurrentStudents.Time, [tblMinisterial&CollegeYear].Ministerial,
tblCurrentStudents.[Programme Year], [tblMinisterial&CollegeYear].*,
tblCurrentStudents.[Projected Completion], tblCurrentStudents.Surname,
tblCurrentStudentContactDetails.[Addr1 (Correspondence)],
tblCurrentStudentContactDetails.[Addr2 (Correspondence)],
tblCurrentStudentContactDetails.[Addr3 (Correspondence)],
tblCurrentStudentContactDetails.[Addr4 (Correspondence)],
tblCurrentStudentContactDetails.[City/Town (Correspondence)],
tblCurrentStudentContactDetails.[State/Province (Corrs)],
tblCurrentStudentContactDetails.[Postal Code/Zip (Corrs)],
tblCurrentStudentContactDetails.[Contact Phone Number],
tblCurrentStudentContactDetails.[Mobile Phone Number],
tblCurrentStudents.Nationality,
[tblMinisterial&CollegeYear].Ministerial AS [Ministerial_tblMinisterial&CollegeYear],
tblEmailAddresses.[Primary Email], tblEmailAddresses.[Alternative Email],
tblGraduateCourseInformation.ThesisTitle, tblGraduateCourseInformation.PersonalTutor
FROM ([tblMinisterial&CollegeYear] INNER JOIN (tblCurrentStudentContactDetails
INNER JOIN (tblCurrentStudents INNER JOIN tblGraduateCourseInformation ON
tblCurrentStudents.[Oss Person Number] = tblGraduateCourseInformation.OSSID) ON
tblCurrentStudentContactDetails.[Oss Person Number] =
tblGraduateCourseInformation.OSSID) ON
[tblMinisterial&CollegeYear].[Oss Person Number] = tblCurrentStudents.[Oss Person Number])
INNER JOIN tblEmailAddresses ON
(tblCurrentStudents.[Oss Person Number] = tblEmailAddresses.[Oss Person Number])
AND (tblCurrentStudents.[Oss Person Number] = tblEmailAddresses.[Oss Person Number]);