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-rwxr-xr-xLedgerSMB/GL.pm2
1 files changed, 1 insertions, 1 deletions
diff --git a/LedgerSMB/GL.pm b/LedgerSMB/GL.pm
index a17580f0..dab7b0a1 100755
--- a/LedgerSMB/GL.pm
+++ b/LedgerSMB/GL.pm
@@ -164,7 +164,7 @@ sub post_transaction {
($null, $project_id) = split /--/,
$form->{"projectnumber_$i"};
- $project_id ||= 'NULL';
+ $project_id ||= undef;
$query = qq|