2562342 - DBSQL_ILLEGAL_SWITCH after a Kernel downgrade

After a Kernel downgrade, the following DBSQL_ILLEGAL_SWITCH DUMPS can be seen in ST22:

Category Internal Kernel Error
Runtime Errors DBSQL_ILLEGAL_SWITCH
Application Component Not assigned

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|Internal notes |
| The termination was triggered in function "DbPrepStatement::setKeyValues" of |
| the SAP kernel, in |
| line 135 of module "//bas/749_STACK/src/krn/dbi/dbsql/dbprepstmt.cpp#1". |
| The internal operation just processed is "SQLN". |
| Internal mode started at 20171112130852. |
| Unexpected value 10 in the case distinction. |
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|Active Calls in SAP Kernel |
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|Lines of C Stack in Kernel (Structure Differs on Each Platform) |
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|[S](LinStackBacktrace+0xa9)[0x651260] |
|[S](LinStack+0x3e)[0x6541cc] |
|[S](CTrcStack2+0x4b)[0x650025] |
|[S](rabax(char16_t const*, char16_t const*, int, char16_t const*, void const*)+0x12b4|
|[S](bool DbPrepStatement::setKeyValues<DbKeyInputValue>(DbInputValues const&, DbKeyVa|
|[S](DbCursor::_getDbCursor(DbStmtScopeObject&, DbInputValues const&, DbOutputValues&,|
|[S](DbCursor::getDbCursor(DbStmtScopeObject&, DbInputAbapValues const&, DbOutputValue|
|[S](ab_jsqln()+0x43e)[0x223bdee] |
|[S](ab_extri()+0x1b8)[0x1f01848] |
|[S](ab_xevent(char16_t const*)+0x23)[0x1f564d3] |
|[S](ab_dstep+0xf6)[0x1efd776] |
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SAP NetWeaver release independent

DBSQL_ILLEGAL_SWITCH, Kernel, Downgrade, Upgrade, Update, Upgrading, Updating, PL, Patch Level , KBA , BC-DB-DBI , DB Independent Database Interface , Problem