debian/changelog

 qgis (3.4.5+dfsg-1~exp2) UNRELEASED; urgency=medium
 
   * Use libqscintilla2-qt5-dev instead of virtual package.
+  * Fix Breaks/Replaces for python3-qgis-common.
 
  -- Bas Couwenberg <sebastic@debian.org>  Sun, 24 Feb 2019 07:16:07 +0100
 

debian/control

@@ -21,8 +21,8 @@ Build-Depends: bison,
                libproj-dev,
                libqca-qt5-2-dev,
                libqca-qt5-2-plugins,
-               libqt5opengl5-dev,
                libqscintilla2-qt5-dev,
+               libqt5opengl5-dev,
                libqt5serialport5-dev,
                libqt5sql5-sqlite,
                libqt5svg5-dev,
@@ -370,8 +370,8 @@ Depends: gdal-bin,
          libqgis-customwidgets (>= ${source:Version}),
          ${python3:Depends},
          ${misc:Depends}
-Breaks: python-qgis (<< 3.4.5)
-Replaces: python-qgis (<< 3.4.5)
+Breaks: python-qgis-common (<< 3.4.5)
+Replaces: python-qgis-common (<< 3.4.5)
 Description: Python bindings to QGIS - architecture-independent files
  QGIS is a Geographic Information System (GIS) which manages, analyzes and
  display databases of geographic information.