from error :
Default exception handler: Error writing to database Debug: Out of range value for column 'groupid' at row 1\nINSERT INTO mdl_block_search_documents (doctype,docid,itemtype,title,url,updated,docdate,courseid,groupid) VALUES(?,?,?,?,?,?,?,?,?)\narray (\n 0 => 'forum',\n 1 => '1',\n 2 => 'head',\n 3 => 'topic 1',\n 4 => 'http://aparup.moodle.local/m20/dev1/moodle/mod/forum/discuss.php?d=1#1',\n 5 => 1287986769,\n 6 => '1285729018',\n 7 => '12',\n 8 => '-1',\n)\n* line 394 of /lib/dml/moodle_database.php: dml_write_exception thrown\n* line 816 of /lib/dml/mysqli_native_moodle_database.php: call to moodle_database->query_end()\n* line 858 of /lib/dml/mysqli_native_moodle_database.php: call to mysqli_native_moodle_database->insert_record_raw()\n* line 244 of /search/indexlib.php: call to mysqli_native_moodle_database->insert_record()\n* line 165 of /search/indexer.php: call to IndexDBControl->addDocument()\n, referer: http://aparup.moodle.local/m20/dev1/moodle/search/stats.php

adding some chit chat for posterity:

aparup:
mdl_forum_discussions.groupid: bigint(10) (signed) defaults to -1 ... is there a reason why this is? i'm seeing that groupid defaults to 0 elsewheres.

skodak:
backwards compatibility
it was one of the first places that used groups 14:24

aparup:
hm so does -1 there mean 0 elsewhere? 14:26

skodak:
it is a bit more difficult, the forum group mode is something different than group mode in assignment for example
in case of forum we track the origin of group where it was posted
so 0 means all groups, -1 no group if I rememebr it correctly
you need to read the code if you want to know exactly
you may use the activity group mode for this too, the -1 looks like a kind of shortcut

aparup:
hm, i'm working on global search and getting
Error writing to database Debug: Out of range value for column 'groupid' at row 1\nINSERT INTO mdl_block_search_documents
wondering how i should populate this field
MDL-24625 14:32

skodak:
search is using a completely wrong approach for dealing with access control, only activities know what these mean
imo

moodler:
yeah, agreed
it never should have had that info in the /search directory