Using moodle 2.3.2
Cant create quiz. Get the screen to selecgt options but when i save the quiz i get an error cant write to database.
I have turned on debugging and this is the result:
Debug info: Field 'previous_link' doesn't have a default value
INSERT INTO mdl_quiz (name,timeopen,timeclose,timelimit,overduehandling,graceperiod,grade,attempts,grademethod,shufflequestions,questionsperpage,navmethod,shuffleanswers,preferredbehaviour,attemptonlast,showuserpicture,decimalpoints,questiondecimalpoints,showblocks,subnet,delay1,delay2,browsersecurity,course,intro,introformat,questions,timemodified,password,reviewattempt,reviewcorrectness,reviewmarks,reviewspecificfeedback,reviewgeneralfeedback,reviewrightanswer,reviewoverallfeedback) VALUES(?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?)
[array (
0 => 'uvufufvuf',
1 => 0,
2 => 0,
3 => 0,
4 => 'autosubmit',
5 => 0,
6 => 100,
7 => '0',
8 => '1',
9 => '1',
10 => '1',
11 => 'free',
12 => '1',
13 => 'deferredfeedback',
14 => '0',
15 => '0',
16 => '2',
17 => '-1',
18 => '0',
19 => '',
20 => 0,
21 => 0,
22 => '-',
23 => '4',
24 => '',
25 => '1',
26 => '',
27 => 1352074280,
28 => '',
29 => 69904,
30 => 4368,
31 => 4368,
32 => 4368,
33 => 4368,
34 => 4368,
35 => 4368,
)]
Error code: dmlwriteexception
Stack trace:
line 410 of /lib/dml/moodle_database.php: dml_write_exception thrown
line 1050 of /lib/dml/mysqli_native_moodle_database.php: call to moodle_database->query_end()
line 1092 of /lib/dml/mysqli_native_moodle_database.php: call to mysqli_native_moodle_database->insert_record_raw()
line 91 of /mod/quiz/lib.php: call to mysqli_native_moodle_database->insert_record()
line 447 of /course/modedit.php: call to quiz_add_instance()
Hope someone knows how to help 
The field mdl_quiz.previous_link should not exist. At least, it has never existed in a Moodle release. Someone may gave added it to your Moodle as a customisation. If so, you will have to sort that out yourself.