Please fix at first the versions in branch since this is the working copy delivered with LyX.
Also please keep the fileformat unless you need to document a new feature that requires a new fileformat.
-#LyX 2.3 created this file. For more info see http://www.lyx.org/
-\lyxformat 512
+#LyX 2.2 created this file. For more info see http://www.lyx.org/
+\lyxformat 508
\begin_document
\begin_header
\save_transient_properties true
\font_osf false
\font_sf_scale 100 100
\font_tt_scale 100 100
-\use_microtype false
\graphics default
\default_output_format pdf2
\output_sync 0
\begin_layout Subsubsection
Verbatim
\begin_inset Index idx
-status open
+status collapsed
\begin_layout Plain Layout
Verbatim
\begin_layout Standard
\begin_inset Branch Question
-inverted 0
status open
\begin_layout Standard
\begin_layout Standard
\begin_inset Branch Réponse
-inverted 0
status collapsed
\begin_layout Standard
\begin_layout Standard
\begin_inset Branch Question
-inverted 0
status open
\begin_layout Standard
\begin_layout Standard
\begin_inset Branch Réponse
-inverted 0
status collapsed
\begin_layout Standard