NSInvalidArgumentException: Application tried to present modally an active controller

[jwalgran]

https://rollbar.com/Azavea/OpenTreeMap/items/3233

NSInvalidArgumentException: Application tried to present modally an active controller <UINavigationController: 0x11a8ad000>.
1 CoreFoundation in 0x1855ec000
2 libobjc.A.dylib in 0x184970000
3 UIKit in 0x18ec04000
4 UIKit in 0x18ec04000
5 UIKit in 0x18ec04000
6 UIKit in 0x18ec04000
7 UIKit in 0x18ec04000
8 UIKit in 0x1a4812000
9 OpenTreeMap "OTMAllInstancesTableViewController.m" line 34 in -[OTMAllInstancesTableViewController viewDidAppear:]
10 OpenTreeMap "OTMMapViewController.m" line 999 in -[OTMMapViewController viewController:editedTree:withOriginalLocation:originalData:withPhoto:]
11 UIKit in 0x18ec04000
12 UIKit in 0x18ec04000
13 UIKit in 0x18ec04000
14 UIKit in 0x18ec04000
15 UIKit in 0x18ec04000
16 UIKit in 0x18ec04000
17 UIKit in 0x18ec04000
18 UIKit in 0x18ec04000
19 UIKit in 0x18ec04000
20 UIKit in 0x18ec04000
21 UIKit in 0x1a4812000
22 UIKit in 0x18ec04000
23 UIKit in 0x18ec04000
24 UIKit in 0x18ec04000
25 CoreFoundation in 0x1855ec000
26 CoreFoundation in 0x1855ec000
27 CoreFoundation in 0x1855ec000
28 CoreFoundation in 0x1855ec000
29 CoreFoundation in 0x1855ec000
30 GraphicsServices in 0x18749a000
31 UIKit in 0x18ec04000
32 OpenTreeMap "OTMChoicesDetailCellRenderer.m" line 229 in -[OTMEditChoicesDetailCellRenderer tableView:cellForRowAtIndexPath:]
33 libdyld.dylib in 0x185113000