[SensorThings] New rows cannot be added after row deletion in expand table

[lucagiovannini]

What is the bug or the crash?

New rows cannot be added after row deletion in expand table.

Steps to reproduce the issue

Select Entity type = Locations
Expand to Things, Datastreams, Observations
Delete row Observations.
Try to add a new row... nothing happens.

Versions

QGIS version
3.38.2-Grenoble
QGIS code revision
130c432
Qt version
5.15.13
Python version
3.12.5
GDAL/OGR version
3.9.2
PROJ version
9.4.0
EPSG Registry database version
v11.004 (2024-02-24)
GEOS version
3.12.2-CAPI-1.18.2
SQLite version
3.45.1
PDAL version
2.6.3
PostgreSQL client version
16.2
SpatiaLite version
5.1.0
QWT version
6.2.0
QScintilla2 version
2.14.1
OS version
Windows 10 Version 2009

Active Python plugins
profiletool
4.1.8
QuickOSM
1.16.0
quick_map_services
0.19.26
SensorThingsAPI
1.1.12
SensorThingsAPI_2
1.0.1
db_manager
0.1.20
grassprovider
2.12.99
MetaSearch
0.3.6
processing
2.12.99

Supported QGIS version

• I'm running a supported QGIS version according to the roadmap.

New profile

• I tried with a new QGIS profile

Additional context

No response